Question

Quanto vale 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

X1=3
X2=5
X3=7
X4=9
Prontinho...