Question

= (x + 4)²= (x - 5)² = 9​

Answer 1

Answer:

2x-2x-9

Step-by-step explanation:

use a+b*2 a-b*2formula

x2 +2(x) (4)+(4)*2=x +8x +16

x*2-2(x)(5)+(5)*2=x-10x+25

sub x+8x +16=x -10x+25