Question

f(x)=-x²+2x-1 me ajudem

Answer 1

f(x)=-x²+2x-1

-x² +2x -1 = 0

x² -2x +1 = 0

Δ = -2² -4

Δ = 0

x = 2/2

x = 1

Xv = -b/2a

Xv = 2/2

Xv = 1

Yv = 0