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Asked by
Meg
Adding and subtracting rational expressions.
3x/x^2+x-12 - x/x^2-16
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Answered by
Steve
Online you needed parentheses so things are not ambiguous. You want a common denominator, so note that
x^2+x-12 = (x+4)(x-3)
x^2-16 = (x+4)(x-4)
Now you can see that the LCD is
(x+4)(x-4)(x-3)
and work with that.
Answered by
yeah
i would have never figured this out
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