Question

factorise : (p^2 + q^2 - r^2) - 4 p^2 q^2

Answer 1

I think you have done mistake in the question..... If the question us correct, then just remove the brackets..... then..

$( {p}^{2} + {q}^{2} + {r}^{2} ) - 4 {p}^{2} {q}^{2}$
will be

${p}^{2} + {q}^{2} + {r}^{2} - 4 {p}^{2} {q}^{2}$

hope it help.

Answer 2

If it will be factorised the answer will be
$p {}^{2} + q {}^{2} - r ^{2} -4 p {}^{2} q {}^{2}$
Hope this helps you
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