State whether True or False.
Simplify : $(p x - q) (p x + q)$ .
The answer is $p^{2} x^{2} - q^{2}$ .

True

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False

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Solution

The correct option is A True
$(p x - q) (p x + q)$
$= p x (p x + q) - q (p x + q)$
$= p^{2} x^{2} + p q x - p q x + q^{2}$
$= p^{2} x^{2} - q^{2}$

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