Question

resolva as equações no conjunto universo dos números racionais f)-x²=-1/9
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Answer 1

Resposta:

Explicação passo-a-passo:

$\displaystyle -x^2=-\frac{1}{9} ~~~multiplique~(-1)\\\\\\x^2=\frac{1}{9}\\\\\\x=\sqrt{\frac{1}{9}} \\\\\\x=\frac{\sqrt{1} }{\sqrt{9} }\\\\\\x=\frac{1}{3}$