6.10 Proficiency exam

( [link] ) The product is $27a^3+9a^2+9a$ and a factor is $3a$ . Find the other factor.

( [link] ) The product is 15x^{(n+5)}y^{(3n-2)} . Find the other factor.

( [link] ) $-14x^2{y}^{4}b-28x^2{y}^{3}b-42x^2{y}^2$

( [link] ) $(y+2)a+(y+2)c$

( [link] ) $6x^2{y}^{2}z+5x^2{y}^3-12xyz-10x{y}^2$

( [link] ) $4a^2-16c^2$

( [link] ) $m^4-n^4$

( [link] ) $b^2+8b+16$

( [link] ) $9y^2-30y+25$

( [link] ) $x^2+5x-15$

( [link] ) $x^2-x-30$

( [link] ) $4x^6-36x^4+80x^2$

( [link] ) $9x^2+25x-6$