Question
Factorise:
$x^2+20 x-69$
$x^2+20 x-69$
✓
Answer
$x^2+20 x-69$
$=x^2+23 x-3 x-69$
$=x(x+23)-3(x+23)$
$=(x+23)(x-3)$
$=x^2+23 x-3 x-69$
$=x(x+23)-3(x+23)$
$=(x+23)(x-3)$
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