What is the prime factorization of 147?
a) 3 × 2 × 5 × 5
b) 3 × 7 × 7
c) 2 × 2 × 3 × 3
d) 3 × 7 × 11 × 13

B. 3×7×7

Step-by-step explanation:

    147

 49 * 3

7 * 7  *  3

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!