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4 x 3 y 5 2 x y 3 is a binomial of degree 8. The degree of the first term is 8.

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3 x + 10 is a binomial of degree 1.

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Linear quadratic cubic

Polynomials of the first degree are called linear polynomials.
Polynomials of the second degree are called quadratic polynomials.
Polynomials of the third degree are called cubic polynomials.
Polynomials of the fourth degree are called fourth degree polynomials.
Polynomials of the n th degree are called n th degree polynomials.
Nonzero constants are polynomials of the 0th degree.

Some examples of these polynomials follow:

4 x 9 is a linear polynomial.

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3 x 2 + 5 x 7 is a quadratic polynomial.

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8 y 2 x 3 is a cubic polynomial.

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16 a 2 32 a 5 64 is a 5th degree polynomial.

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x 12 y 12 is a 12th degree polynomial.

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7 x 5 y 7 z 3 2 x 4 y 7 z + x 3 y 7 is a 15th degree polynomial. The first term is of degree 5 + 7 + 3 = 15 .

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43 is a 0th degree polynomial.

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Classification of polynomial equations

As we know, an equation is composed of two algebraic expressions separated by an equal sign. If the two expressions happen to be polynomial expressions, then we can classify the equation according to its degree. Classification of equations by degree is useful since equations of the same degree have the same type of graph. (We will study graphs of equations in Chapter 6.)

The degree of an equation is the degree of the highest degree expression.

Sample set a

x + 7 = 15 .

This is a linear equation since it is of degree 1, the degree of the expression on the left of the " = " sign.

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5 x 2 + 2 x 7 = 4 is a quadratic equation since it is of degree 2.

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9 x 3 8 = 5 x 2 + 1 is a cubic equation since it is of degree 3. The expression on the left of the " = " sign is of degree 3.

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y 4 x 4 = 0 is a 4th degree equation.

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a 5 3 a 4 = a 3 + 6 a 4 7 is a 5th degree equation.

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y = 2 3 x + 3 is a linear equation.

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y = 3 x 2 1 is a quadratic equation.

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x 2 y 2 4 = 0 is a 4th degree equation. The degree of x 2 y 2 4 is 2 + 2 = 4 .

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Practice set a

Classify the following equations in terms of their degree.

3 x + 6 = 0

first, or linear

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9 x 2 + 5 x 6 = 3

quadratic

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25 y 3 + y = 9 y 2 17 y + 4

cubic

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5 x 7 = 3 x 5 2 x 8 + 11 x 9

eighth degree

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Exercises

For the following problems, classify each polynomial as a monomial, binomial, or trinomial. State the degree of each polynomial and write the numerical coefficient of each term.

5 x + 7

binomial; first (linear); 5 , 7

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4 x 2 + 9

binomial; second (quadratic); 4 , 9

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a 4 + 1

binomial; fourth; 1 , 1

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5 x

monomial; first (linear); 5

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5 x 3 + 2 x + 3

trinomial; third (cubic); 5 , 2 , 3

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41 a 3 + 22 a 2 + a

trinomial; third (cubic); 41 , 22 , 1

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2 c 6 + 0

monomial; sixth; 2

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9 g

monomial; first (linear); 9

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3 y z 6 y + 11

trinomial; second (quadratic); 3 , 6 , 11

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7 a b 2 c 2 + 2 a 2 b 3 c 5 + a 14

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x 4 y 3 z 2 + 9 z

binomial; ninth; 1 , 9

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6 + 3 x 2 y 5 b

binomial; eighth; 6 , 3

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9 + 3 x 2 + 2 x y 6 z 2

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3 x 2 y 0 z 4 + 12 z 3 , y 0

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4 x y 3 z 5 w 0 , w 0

monomial; ninth; 4

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Classify each of the equations for the following problems by degree. If the term linear, quadratic, or cubic applies, state it.

9 z = 12 x 18

linear

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y 5 + y 3 = 3 y 2 + 2

cubic

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x 2 + x 4 = 7 x 2 2 x + 9

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2 y + 5 x 3 + 4 x y = 5 x y + 2 y

quadratic

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8 a + 2 b = 4 b 8

linear

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2 x 5 8 x 2 + 9 x + 4 = 12 x 4 + 3 x 3 + 4 x 2 + 1

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x + 3 x 5 = x + 2 x 5

fifth degree

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3 x 2 y 4 + 2 x 8 y = 14

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10 a 2 b 3 c 6 d 0 e 4 + 27 a 3 b 2 b 4 b 3 b 2 c 5 = 1 , d 0

19th degree

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The expression 4 x 3 9 x 7 is not a polynomial because

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The expression a 4 7 a is not a polynomial because

. . . there is a variable in the denominator

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Is every algebraic expression a polynomial expression? If not, give an example of an algebraic expression that is not a polynomial expression.

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Is every polynomial expression an algebraic expression? If not, give an example of a polynomial expression that is not an algebraic expression.

yes

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How do we find the degree of a term that contains more than one variable?

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Exercises for review

( [link] ) Use algebraic notation to write “eleven minus three times a number is five.”

11 3 x = 5

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( [link] ) Simplify ( x 4 y 2 z 3 ) 5 .

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( [link] ) Find the value of z if z = x u s and x = 55 , u = 49 , and s = 3 .

z = 2

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( [link] ) List, if any should appear, the common factors in the expression 3 x 4 + 6 x 3 18 x 2 .

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( [link] ) State (by writing it) the relationship being expressed by the equation y = 3 x + 5 .

The value of y is 5 more then three times the value of  x .

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Questions & Answers

A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
Aislinn Reply
cm
tijani
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John Reply
what is physics
Siyaka Reply
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Jude Reply
Can you compute that for me. Ty
Jude
what is the dimension formula of energy?
David Reply
what is viscosity?
David
what is inorganic
emma Reply
what is chemistry
Youesf Reply
what is inorganic
emma
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
Krampah Reply
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
Sahid Reply
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
Samuel Reply
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Joseph Reply
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what's motion
Maurice Reply
what are the types of wave
Maurice
answer
Magreth
progressive wave
Magreth
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Muhammad Reply
fine, how about you?
Mohammed
hi
Mujahid
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
yasuo Reply
Who can show me the full solution in this problem?
Reofrir Reply
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Source:  OpenStax, Elementary algebra. OpenStax CNX. May 08, 2009 Download for free at http://cnx.org/content/col10614/1.3
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