Question
Factorise:
$1029-3 x^3$
$1029-3 x^3$
✓
Answer
$1029-3 x^3$
$=3\left(343-x^3\right)$
$=3\left[(7)^3-x^3\right]$
$=3\left[(7-x)\left(7^2+7 x+x^2\right)\right]$
$=3(7-x)\left(49+7 x+x^2\right)$
$=3\left(343-x^3\right)$
$=3\left[(7)^3-x^3\right]$
$=3\left[(7-x)\left(7^2+7 x+x^2\right)\right]$
$=3(7-x)\left(49+7 x+x^2\right)$
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