Solve: 3 x^3 y-243 x y^3 - Vidyadip

Question

Solve:
$ 3 x^3 y-243 x y^3 $

✓

Answer

$ 3 x^3 y-243 x y^3 $
$ =3 x y\left(x^2-81 y^2\right) $
$ =3 x y\left[x^2-(9 y)^2\right] $
$ =3 x y(x-9)(x+9 y) $

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