Question 139261: Factor trinomials.
2x^2+7x-15
(2x )(7x )
How?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 2x^2+7x-15
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Using the AC Method to factor:
Think of two numbers whose product is ac = 2*-15 = -30
and whose sum is b = 7
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The numbers are 10 and -3
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Replace 7x by 10x-3x to get:
2x^2 + 10x - 3x - 15
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Factor the 1st two and the last two terms separately:
2x(x+5)-3(x+5)
Factor again to get the final answer:
(x+5)(2x-3)
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cheers,
Stan H.
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