zaid2820
contestada

For what values of x will the function f(x) = 5x^2 + x - 6 equal zero?

A)x = -3 or 2

B)x=6/5 or -1

C)x = 3 or -2

D)x = -6/5 or 1

Respuesta :

5x² + x - 6 = 0

Δ = 1² - 4*5*(-6) = 121 = 11²

x' = (-1 - 11) / (2x5) = -12/10 = - 6/5

x" = (-1 + 11) / (2x5) = 10/10 = 1

=> D