Question
Using the standard formulae, expand:
$\left(5 x+\frac{1}{5 x}\right)\left(5 x-\frac{1}{5 x}\right)$
$\left(5 x+\frac{1}{5 x}\right)\left(5 x-\frac{1}{5 x}\right)$
✓
Answer
$25 x^2-\frac{1}{25 x^2}$
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