Question

Multiply and simplify: (4t − 9)2
16t2 + 81
16t2 − 72t + 81
16t2 − 72t − 81
16t2 − 81

Answer 1

Use the identity \((a-b)^2 = a^2 -2ab + b^2\)
Put a= 4t and b=9 into it.
\((4t-9)^2 = (4t)^2 -2(4t)(9) + 9^2 = ...?\)

Answer 2

(4t-9)^2
=>(4t)^2+(-9)^2+2(4a)(-9)=??

Answer 3

=16t^2+81-72t

Answer 4

clear????

Answer 5

YES

Answer 6

It's clear because you've given the asker the answer.

Answer 7

k!

Answer 8

yw:)

Answer 9

LOL @RolyPoly