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Wiskunde

Graad 8

Getallestelsel

(natuurlike- en telgetalle)

Module 5

Vermenigvuldiging in algebra

KLASOPDRAG 1

  • Kom ontdek stap vir stap meer omtrent VERMENIGVULDIGING in ALGEBRA….

1. Waaraan sal die volgende gelyk wees aan? .....

1.1: 2 x 2 x 2 = ......................... (en in eksponensiële vorm? ......................... )

1.2: 2² x 2² x 2 3 x 3² x 3 3 = .........................

(en in eksponensiële vorm? ......................... )

  • :a x a x a = .........................

1.4: a ² x a ² x a 3 = .........................

Skryf nou ‘n algemene reël vir die vermenigvuldiging van eksponente hier neer:

1.5: 2( a - b ) = .........................

distributiewe wet: (2 x a ) - (2 x b )

1.6: 3 0 = .........................

1.7: a ( a + b ) 0 = .........................

Dus : (enige iets) tot die mag 0 = .........................

1.8: 3 1 = .........................

1.9: 1 200 = .........................

2. Wat beteken elk van die volgende? Gee dan die vereenvoudigde antwoord van elk.

2.1: a ² =

2.2: 2 ab =

2.3: -3( a + b ) =

2.4: 4( a )² =

2.5: ( a 3 )² =

2.6: (3 a ²) 3 =

2.7: 2 p x 3 p =

2.8: ab ² x a ² b 3 x ab 6 =

2.9: ( 1 2 size 12{ { { size 8{1} } over { size 8{2} } } } {} a 3 ) 4 =

2.10: 2( a 3 )² =

2.11: 6(2 a - 3 b ) =

2.12: -7 a ( a ² - 2 b ² ) =

3. Kan jy nog die volgorde van bewerkings onthou? Skryf dit neer.....

3.1 Bereken nou die volgende deur alles wat jy tot dusver geleer het, te onthou:

3.1.1: a x a x aaa + a 4

3.1.2: 2( a + b ) - 3( a - b )

3.1.3: 3 a x 2 a ²b + 5 a ² x (-3 ab )

3.1.4 : -5 a ( a - b 3 ) + 7 ab 3 - 2 a 5

3.1.5: -3( a ² b 4 )² - 5 a 3 (-2 a 4 b ²) 3

4. Wat beteken die woord substitusie?

Gee ‘n voorbeeld om ter verduideliking:

5. As a = 5 ; b = -1 en c = 3 , bereken die waarde van elk van die volgende:

5.1: 5 a ² - 3 b

5.2: 2 ab 2 3a size 12{ { {2 size 11{ bold "ab" rSup { size 8{2} } }} over { size 12{3a} } } } {}

5.3: a + b ² a b size 12{ { { size 11{a}" "+" " size 11{b}²} over { size 11{a}` - ` size 11{b}} } } {}

5.4: (2 ab ² c

5.5: -3 ab 3 - 2 ab 3 c

HUISWERKOPDRAG 1

1. Vereenvoudig elk van die volgende:

1.1: ( a 5 ) 6

1.2: 5(3 a - 7 a

1.3: -5(3 a - 2 b )

1.4: (3 a )² . [ (2 a )² ] 3

1.5: p x 2 x m x q

1.6: w ² x 3 b x 1 / 3 b x w

1.7: -5 a ( 3 a - 5 ab )

1.8: (3 a )² (2 a ) + (4 a ²) (-2 a )

1.9: (5 ab ²) 4 - (- 6 b 6 a 4 )

1.10: -6 a ² b ( 2 a ² - 3 ab 3 + 5)

2. As x = -2 en y = -1 , bepaal die waarde van ...

2.1: (2 y )(2 x size 12{x} {}

2.2: -3 x size 12{x} {} 3 - 2 y 5

2.3: (2 y + 2 x size 12{x} {}

3. As m = 2 ; n = -3 en q = 5, bepaal die waarde van elk van die volgende uitdrukkings:

3.1: m + n + q

3.2: 4 m - 2 n - 3 q

3.3: 2( m ² + q ²) - n ²

3.4: m / 3 + n / 4 - q

3.5: 3 m ( n + q ) - 2( m + n ²)

4. Uitdaging: Kyk of jy met al die kennis tot jou beskikking die volgende probleme kan oplos.

4.1 Die gemiddelde spoed van ‘n Intercape Mainliner is 5 a 4 kilometer per uur.Watter afstand sal die bus in (5 a 3 + 5 a - 6) uur aflê?

4.2 Mej. Suid - Afrika koop ( a - b + 2 c ) liter melk teen 4ab rand per liter en 5ab liter vrugtesap teen (2 a + 5 b - 3 c ) rand per liter.

Wat sal die bogenoemde altesaam kos?

Assessering 2.3

Assessering van myself: deur myself: Assessering deur opvoeder:
Ek kan… 1 2 3 4 Kritieke Uitkomste 1 2 3 4
uitdrukkings in eksponensiële vorm skryf; (Lu 2.2; 1.6.3) Kritiese en skeppende denke
eksponente suksesvol bymekaar tel; (Lu 2.2; 1.6.3) Deelname
eksponente suksesvol van mekaar aftrek; (Lu 2.2; 1.6.3) Organisering en bestuur
eksponente suksesvol met mekaar vermenigvuldig; (Lu 2.2; 2.8.3&.4) Prosessering van inligting
uitdrukkings met hakies oplos; (Lu 2.2; 2.8.5) Kommunikasie
die volgorde van bewerkings onthou; (Lu 2.2; 2.8.5) Probleemoplossing
waardes van uitdrukkings bereken d.m.v. substitusie. (Lu 2.2; 2.8.5; 1.6.2; 1.6.3)
Selfstandigheid

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
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Source:  OpenStax, Wiskunde graad 8. OpenStax CNX. Sep 11, 2009 Download for free at http://cnx.org/content/col11033/1.1
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