Question

DADA A FUNÇÃO f(x)=-x2+2x-1, determine: f(x)=0

Answer 1

- x² + 2x - 1 = 0

x = $\frac{-b +-\sqrt{b^2 - 4ac}}{2a}$

x = $\frac{-2 +-\sqrt{2^2 - 4 * -1 * -1}}{2* -1}$

x' = (-2 + 0) / -2

x' = 1

x'' = (-2 - 0) / -2

x'' = 1