Asked by Meg

Adding and subtracting rational expressions.


3x/x^2+x-12 - x/x^2-16

Answers

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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