Question

Urgente, por favor!

A) 8x² = 60 - 7 x²

B) 2x² - 90 = 8

C) 2 x² - 2 = x² + 7

D) 5 x² - 5 = 4 x² + 4

E) x² = 49

F) x² - 1 = 0

G) 7 x² - 21 = 0

Answer 1

Resposta:

a- x' = -2 ; x" = 2

b- x' = -7 ; x" = 7

c- x' = -3 ; x" = 3

d- x' = -3 ; x" = 3

e- x' = -7 ; x" = 7

f- x' = -1 ; x" = 1

g- x' = -√3 ; x" = √3