You can put this solution on YOUR website! factor this problem. x^2+2x-15=0
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Think of two numbers whose product is -15
and whose sum is 2.
The numbers are +5 and -3
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Rewrite the problem with middle term replaced:
x^2 +5x-3x - 15 = 0
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Factor:
x(x+5)-3(x+5)-15 = 0
Factor again:
(x+5)(x-3) = 0
x = -5 or x = 3
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Cheers,
Stan H.
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