Question

qual é o valor de X² + 3x -10 =0​

Answer 1

Explicação passo-a-passo:

x2 +3x_10=0

1x+3x=10+0

4x=10

x=10/4 :2 5/2

RESPOSTA:5/2

Answer 2

Resposta:

X² + 3x -10 =0​

Δ = $b^{2} - 4ac$

Δ = $3^{2} - 4 * 1 * (-10)$

Δ = $9 + 40$

Δ = 49

$x = \frac{-b +- \sqrt{delta} }{2a} \\\\x = \frac{-3 +- \sqrt{49} }{2 * 1} \\\\x = \frac{-3 +- 7}{2} \\\\\\x1 = \frac{-3 + 7 }{2} = \frac{4}{2} = 2 \\\\x1 = 2\\\\\\x2 = \frac{-3 - 7}{2} = \frac{-10}{2} = -5 \\\\x2 = -5$

Explicação passo-a-passo: