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Pooch
Mathematics
11 June, 06:53
Which expression is a factor of x^2 + 2x - 15?
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Beanie
11 June, 07:07
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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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