Factorise b^2+8b+15 completely.
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To factorise
b² + 8b + 15
b² + 8b + 15
= b² + 5b + 3b + 15
= b (b+5) +3 (b +5)
= (b+3)(b+5)
b = -3
and
b = -5
Answer:
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