217k views
4 votes
How do you solve quadratic using square roots?ex: m²=81

1 Answer

5 votes

we have

m²=81​

Apply square roots both sides


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

simplify

m=(+/-)9

are two solutions

because

(-9)^2=81

and

(9)^2=81

User Eugen Dubrovin
by
8.2k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories