Question

x² = x + 12. ajuda aqui​

Answer 1

Vamos lá.

x² = x + 12

x² - x - 12 = 0

delta

d = 49

x1 = (1 + 7)/2 = 4

x2 = (1 - 7)/2 = -3

2x² - 8x + 8 = 0

x² - 4x + 4 = 0

(x - 2)² = 0

x = 2

Answer 2

Resposta:

x² = x + 12

x² - x - 12 = 0

delta

d = 49

x1 = (1 + 7)/2 = 4

x2 = (1 - 7)/2 = -3

2x² - 8x + 8 = 0

x² - 4x + 4 = 0

(x - 2)² = 0

x = 2