Question

Preciso dissopro dia 4/08/20​

Answer 1

Boa Noite ^^

A) x² - 256 = 0

x² = 256

x = √256

x = 16

B) x² - 49 = 0

x² = 49

x = √49

x = 7

C) -5x² + 125 = 0

5x² = 125

x² = 125/5

x² = 25

x = √25

x  = 5