Question

zero da função quadratica f(x)=(x+2)(x-2)

Answer 1

aplica a distributiva

x^2-2x+2x-4=0
x^2-4=0

usa baskara agr

Answer 2

f(x)=x²+2x-2x-4
f(x)=x²-4
x= 2 e -2