Question
Find following products: $\Big(\text{x}+\frac{1}{\text{x}}\Big)\Big(\text{x}-\frac{1}{\text{x}}\Big)$
✓
Answer
$\Big(\text{x}+\frac{1}{\text{x}}\Big)\Big(\text{x}-\frac{1}{\text{x}}\Big)$$=(\text{x})^2-\Big(\frac{1}{\text{x}}\Big)^2$
$\text{x}^2-\frac{1}{\text{x}^2}$
$\text{x}^2-\frac{1}{\text{x}^2}$
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