Question

RESOLVA "-25+x²=0", E, "7x²+2=30"

Answer 1

Boa Noite ^^

A) -25 + x² = 0

x² = 25

x = √25

x = 5

B) 7x² + 2 = 30

7x² = 30 - 2

7x² = 28

x² = 28/7

x² = 4

x = √4

x = 2