Respuesta :

we have

m²=81​

Apply square roots both sides

[tex]\begin{gathered} \sqrt[]{m^2}=\pm\sqrt[]{81} \\ (m^2)^{(\frac{1}{2})}=\pm(9^2)^{(\frac{1}{2})} \end{gathered}[/tex]

simplify

m=(+/-)9

are two solutions

because

(-9)^2=81

and

(9)^2=81

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