Question

f(x)=x² -8x +16 zero de funçao

Answer 1

f(x)=x^2-8x+16
x^2-8x+16=0
delta=b^2-4.a.c
delta=(-8)^2-4.1.16
delta=64-64
delta=0
x=-b-/+ raiz de delta/2a
x=-(-8)-0/2.1
x=8/2
x=4