Question

o grafico que representa a funçao f(x)=x2-4x+13

Answer 1

x²-4x+13
a=1b=4c=13

Δ=b²-4*a*c
Δ=-4²(-4)*1*13
Δ=-16-52
Δ=36

x'=-4+6/2*1=1
x"=-4-6/2*1=-5