Divya is solving the following equation for $w$.
>$3w-\sqrt{20-5w}=2$
Her first few steps are given below.
>$\begin{align}
3w&=\sqrt{20-5w}+2\\
\\
3w-2&=\sqrt{20-5w}\\
\\
(3w-2)^2&=\left(\sqrt{20-5w}\right)^2\\
\\
9w^2-12w+4&=20-5w
\end{align}$
**Is it necessary for Divya to check her answers for extraneous solutions?**
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