Question

quanto é (x+8)² ???
obg a quem ajudar ^^

Answer 1

(x+8)² =     x²+16x+64
.....

Answer 2

(x+8)²
x²+2.x.8+8²
x²+16x+64=0
∆=b²-4ac
∆=16²-4.1.64
∆=256-256
∆=0
x=-b±√∆/2a
x=-16-0/2.1
x=-16/2
x=-8
S={-8}