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11 June, 06:53

Which expression is a factor of x^2 + 2x - 15?

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  1. 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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