Question

7) Quanto vale x ?
a) x^2=9
b) x^2=25
c) x^2=49
d) x^2=81​

Answer 1

Resposta:

Explicação passo-a-passo:

$a)x^{2} =9\\x=\sqrt{9}=3 \\\\b)x^{2}=25 \\x=\sqrt{25}=5 \\\\c)x^{2}=49 \\x=\sqrt{49}=7 \\\\d)x^{2}=81 \\x=\sqrt{81} =9$