Question

funcao do segundo grau f(x)=x2-6x+8

Answer 1

Olá
 20$x^{2}$-6x+8
f(x)=0
2x$x^{2}$-6x+8=0
a=2 b=-6 c=8
Δ=b²-4.a.c
Δ=(2)²-4.(-6).8=0
Δ=4+192
Δ=196
x=-b+-√Δ/2.a
x+-(-6)+-√196/2.2
x=6+-14/4
x1=6-14/4=2
x2=6+14/4=5