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lesya
[120]
3 years ago
9
Which expression is a factor of x^2 + 2x – 15?
Mathematics
Answer
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1
answer:
Ksju
[112]
3 years ago
7
0
To factor this you need values that add up to 2 and multiply to -15
So you get 5,-3 then you put it into your equation for you b value
X^2+5x-3x-15
Then you can factor by grouping
X(x+5)-3(x+5)
So your factors are
(X+5)(x-3)
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