Question

x2-3x-10 calcule a função quadrática

Answer 1

Vamos la

x² - 3x - 10 = 0

d² = 9 + 40 = 49, d = 7

x1 = (3 + 7)/2 = 10/2 = 5

x2 = (3 - 7)/2 = -4/2 = -2

Answer 2

Bom dia!

Calculo;

A= 1
B= 3
C = - 10

Δ² = b² - 4 • a • c

Δ² = 3² - 4 • 1 • ( - 10 )

Δ²= 9 + 40

Δ² = 49

Δ² = √ 49

Δ = 7

X = - b ± √ Δ / 2 • a

X = 3 ± √ 7 / 2 • 1

X = 3 ± 7 / 2

X1 = 3 + 7 / 2 = 10 / 2 = 5

X2 = 3 - 7 / 2 = - 4 / 2 = - 2