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Properties of Square Numbers

Solve the fol...

Question

Solve the following by using the method of completing square.
$m^{2} - 18 m + 81 = 0$

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Solution

We have,
$\begin{matrix} m^{2} - 18 m + 81 = 0 {(m - 9)}^{2} = 0 m = 9, 9 \end{matrix}$

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