Question

4) Quanto vale x? a) x 2 = 36 b) x 2 = 49 c) x 2 = 81 d) x 2 = 9

Answer 1

Resposta:

$x^{2} =36\\x=\sqrt{36}\\x=6$

$x^{2} =49\\x=\sqrt{49} \\x=7$

$x^{2} =81\\x=\sqrt{81} \\x=9$

$x^{2} =9\\x=\sqrt{9} \\x=3$

Explicação passo-a-passo: