Question

2) Quanto vale x?
a)
${ \times }^{2} = 9$

b)
${ \times }^{2} = 25$

c)
${ \times }^{2} = 81$

d)
${ \times }^{2} = 49$
​

Answer 1

A) 3 b) 5 c) 9 d)7 pois 3.3=9 5.5=25 9.9=81 7.7=49