Question

quanto vale o x?
x² = 9
x² = 25
x² = 49
x2 = 81

Answer 1

x² = 9
x = +-√9
x = +- 3

x² = 25
x = +- √25
x = +- 5

x² = 49
x = +-√49
x = +-7

x² = 81
x = +-√81
x = +- 9

Answer 2

X2=9 X=3 X2=25 X=5 X2=49 X=7 X2=81 X=9