Question

X2+2×-8=0

Ajuda pfvr

Answer 1

Resposta:

x² + 2x - 8 = 0

a = 1, b = 2, c = -8

delta = b² - 4 . a . c

delta = 2² - 4 . 1 . (-8)

delta = 4 - 4 . (-8)

delta = 4 + 32

delta = 36

-b + ou - raiz de delta (36), sobre 2.a

x' = -2 + 6 / 2 = 2

x" = -2 - 6 / 2 = -4