Question
Factorise:
$10 x^2-9 x-7$
$10 x^2-9 x-7$
✓
Answer
$10 x^2-9 x-7$
$=10 x^2+5 x-14 x-7$
$=5 x(2 x+1)-7(2 x+1)$
$=(2 x+1)(5 x-7)$
$=10 x^2+5 x-14 x-7$
$=5 x(2 x+1)-7(2 x+1)$
$=(2 x+1)(5 x-7)$
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