Question:
Factorise
$1029-3 x^{3}$
Solution:
$1029-3 x^{3}$
$=3\left(343-x^{3}\right)$
$=3\left(7^{3}-x^{3}\right)$
$=3(7-x)\left(49+x^{2}+7 x\right)$
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