Question

y=(x-3).(x+2) funçao quadrativa​

Answer 1

Resposta:

y = (x - 3).(x + 2)

y = x² + 2x - 3x - 6

y = x² - x - 6

Δ = b² - 4.a.c

Δ = (-1)² -4.1.(-6)

Δ = 1 + 24

Δ = 25

x = -b ± √Δ

         2a

x =-(-1) ± √25

         2.1

x =  1 ± 5

        2

x¹ = 6/2 = 3

x² = - 4/2 = -2