SOLUTION: I have a rational expression that I need help with. The equation is this: 1+7/x-60/x^2=0 I know I have to find the LCD which I think is x so I would multiply x*1+7/x*x-60/x^2*x=0

SOLUTION: I have a rational expression that I need help with. The equation is this: 1+7/x-60/x^2=0 I know I have to find the LCD which I think is x so I would multiply x1+7/xx-60/x^2*x=0

Question 997007: I have a rational expression that I need help with. The equation is this:
1+7/x-60/x^2=0
I know I have to find the LCD which I think is x so I would multiply x*1+7/x*x-60/x^2*x=0*x
From here I cross cancel so that my equation will look like this:
x+7-60/x=0. Is this right? Or would x^2 be the LCD? Can you advise me?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
I have a rational expression that I need help with. The equation is this:
1+7/x-60/x^2=0
----------
It's an equation, not just an expression.
There's an equal sign.
----
If it's 1 + (7/x) - (60/x^2) = 0
Multiply by x^2
--> x^2 + 7x - 60 = 0
If you want to solve for x:
(x-12)*(x+5) = 0
x = 12
x = -5
------------------
The LCD is not involved. It applies to adding and subtracting.

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