Question

Factorise b^2+8b+15 completely.

Answer 1

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 2

Answer:

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