Question
Factorise:
$2 x^2+3 x-90$
$2 x^2+3 x-90$
✓
Answer
$2 x^2+3 x-90$
$=2 x^2-12 x+15 x-90$
$=2 x(x-6)+15(x-6)$
$=(x-6)(2 x+15)$
$=2 x^2-12 x+15 x-90$
$=2 x(x-6)+15(x-6)$
$=(x-6)(2 x+15)$
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