Question

can you tell me if i factored these polynomials correct.

a^2-5a-20 is prime.

a^2+12ab+27b^2 = (a+3b)(a+9b)

2a^2+20a+100 = (2a+20)(a+5)

Answer 1

Uh, try multiplying the last one out. Do you get what you started with?

Answer 2

for the last one, remember to factor our gcf.

Answer 3

there's a bigger problem with the last answer :-)