Question:
Factorise
$8 x^{2} y^{3}-x^{5}$
Solution:
$8 x^{2} y^{3}-x^{5}=x^{2}\left(8 y^{3}-x^{3}\right)$
$=x^{2}(2 y-x)\left(4 y^{2}+x^{2}+2 x y\right)$
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