Select the correct answer. Which expression is equivalent to this polynomial expression?
(5xy^2 + 3x^2–7) + (3x^2y^2 – xy^2 + 3y^2 + 4)

Option B

Step-by-step explanation:

if we solve this lets rewrite it order

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!