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How do you factor the equation 2w^2 + 3w - 90?
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High School Teacher
Best answer as selected by question asker.
To factor 2w^2+3w-90.
The first term is 2w^2 and the last term is -90. Their product is 2w^2(-90) = -180w^2.. The factors of -180w^2 in such way that the sum of the factors is middle term,3w of the given quadratic is. -180w^2 = (15w)(-12w). And (15w)+(-12w)=3w.
Now we can can group the given quadratic splitting the middle term into 15w and -12w as below:
Posted by neela on May 3, 2010 at 9:37 AM (Answer #1)
The given expression is:
2w^2 + 3w - 90
(Please note that it is just an expression, not an equation)
We can find factors of this expression by modifying it in equivalent expression in following steps:
2w^2 - 12w + 15w - 90
2w(w - 6) + 15(w - 6)
(w - 6)(2w + 15)
Factors of the given expression are (w - 6) and (2w + 15).
Posted by krishna-agrawala on May 3, 2010 at 11:24 AM (Answer #2)
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