Question

Emcontra a raiz de F(x) =ײ+3x-10

Answer 1

Vamos lá.

x² + 3x - 10 = 0

A completar o quadrado

x² + 3x = 10

x² + 3x + 9/4 = 10 + 9/4

(x + 3/2)² = 49/4

x1 + 3/2 = 7/2

x1 = 2

x2 + 3/2 = -7/2

x2 = -10/2 = -5