HELP PLS HURRY PLS‼️‼️‼️‼️‼️‼️ 30 POINTS‼️‼️ 1. 4x^2=64
2. 4(x-3)^2=25
3. x^2-3x-28=0
4. x^2-x=6
5. 2x^2-4x-3=0
6. x^2+10x-3=0
7. 1.5x^2-4.3x=-1.2
8. x^2-1/4=0

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!