(x-2 x )^2 Here a=x and b=2 x & (x-2 x )^2=x^2-2 x 2 x + (2 x )^2 & .... [(a-b)^2=a^2-2 a b+b^2 ] & (x-2 x )^2=x^2-4+4 x^2 &

Expand : (x-2 x )^2

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Expand : $\left(x-\frac{2}{x}\right)^2$

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Answer

$\left(x-\frac{2}{x}\right)^2$
Here $a=x$ and $b=\frac{2}{x}$
$
\begin{aligned}
& \left(x-\frac{2}{x}\right)^2=x^2-2 \times x \times \frac{2}{x}+\left(\frac{2}{x}\right)^2 \\
& \text {.... }\left[(a-b)^2=a^2-2 a b+b^2\right] \\
& \therefore \quad\left(x-\frac{2}{x}\right)^2=x^2-4+\frac{4}{x^2} \\
&
\end{aligned}
$

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