Question

d) y = (x − 3)(x + 2)​

Answer 1

Resposta:

y = {3, -2}

Explicação passo a passo:

(x − 3)(x + 2)​

x² + 2x - 3x -6

x² - x - 6 = 0

Δ b² - 4ac

Δ ( -1)² - 4. 1. -6

Δ 1 + 24

Δ $\sqrt{25}$

x' =  - b + $\sqrt{25}$

            2a

x'= = 1 + 5 / 2

x' = 6 / 2

x' = 3

x'' = - b - $\sqrt{25}$

           2a

x'' = 1 - 5 / 2

x'' = - 4 / 2

x'' = -2