Simplify: (p q-q r)^2+4 p q^2 r - Vidyadip

Question

Simplify:
$ (p q-q r)^2+4 p q^2 r $

✓

Answer

$ (p q-q r)^2+4 p q^2 r $
$ =p^2 q^2+q^2 r^2-2 p q^2 r+4 p q^2 r $
$ =p^2 q^2+q^2 r^2+2 p q^2 r $

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