Question 147296: x^2-2x-15=0
Answer by nerdybill(7384)   (Show Source):
You can put this solution on YOUR website! x^2-2x-15=0
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Attempt to "factor" first
Failing that, then use the "quadratic equation".
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When factoring:
ask yourself what two factors of 15 will combine to give you -2.
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Factors of 15:
1 15
3 5
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Therefore, it would be:
(x+3)(x-5) = 0
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To find the solution, set each of the above factors to zero and solve:
x+3 = 0
x = -3
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x-5=0
x = 5
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Solution: {0,5}
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