Hi, please help if your good at terms in math 30b+60 is my problem
First what I did was find the gcf of 30 and 60 which is 30.
then I wrote the expression 30(1b+2) as my answer, I pressed enter and it says it was wrong. Can someone please tell me what I did wrong and how to get the right answer?

∠cbe and ∠deb are same-side interior angles.

i took the test

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!