Posted by Crystal on Tuesday, March 23, 2010 at 6:19pm.
Can you think of two numbers which when multiplied give you -8 (the last number) and when added will give you +2 (the coefficient of the middle term) ?
How about 4 and -2, so .... (4)(-2 = -8 , 4 + (-2) = +2
x^2 + 2x - 8
= (x+4)(x-2)
If the coefficient of the square term is 1, like in x^2, follow the above method.
If there are factors, it will work.
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