Question

na equação Y= -2x²+4x-2 ,quanto vale x,para Y=0 ?

Answer 1

-2x² + 4x - 2 = 0

a = -2
b = 4
c = -2


Δ = b² - 4ac
Δ = (4)² - 4 * (-2) * (-2)
Δ = 16 - 16
Δ = 0


x' = -b ± √Δ / 2a
x' = -4 ± √0 / 2 * (-2)
x' = -4/-4
x' = 1


x" = -1