x^2 + 8x + 15 factorise please
Answers
Answered by
3
Step-by-step explanation:
x^2 + 8x + 15
= x^2 + 3x + 5x + 15
= (x+3)(x+5)
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Answered by
4
Answer:
The given polynomial:
x²+8x+15=0
Here, 5 and 3 are the factors of 15 that add up to 8.
3×5=15
3+5=8
Factorising using splitting the middle term,
x²+8x+15=0
x²+3x+5x+15=0
x(x+3) +5 (x+3)=0
(x+3)(x+5)=0
Therefore, Answer=> (x+3) (x+5) =0
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