Question

equaçao do 2 graul y=x²-16x+64=0

Answer 1

Δ = b² - 4ac
Δ = (-16)² - 4*1*64
Δ = 256 - 256
Δ = 0

Se Δ = 0 as duas raízes são iguais:

x = -b ± √Δ/2a
x' = -(-16)+0/2 = 16/2 = 8
x'' = -(-16)-0/2 = 16/2 = 8