Question
Factorise:
x2 + 20x - 69
x2 + 20x - 69
✓
Answer
x2 + 20x - 69
= x2 + 23x - 3x - 69
= x(x + 23) - 3(x + 23)
= (x + 23)(x - 3)
= x2 + 23x - 3x - 69
= x(x + 23) - 3(x + 23)
= (x + 23)(x - 3)
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