SOLUTION: please help me to solve the following equations: find the LCD for the given rational expression and convert each rationalexpression into an equivalent rational expression with t

Question 88020: please help me to solve the following equations:
find the LCD for the given rational expression and convert each rationalexpression into an equivalent rational expression with the LCD as the denominator.
64) 4/x-y, 5x/2y-2x
70) 3/4b^2-9,2b/2b+3,-5/2b^2-3b
69) -5/6x-12,x/x^2-4,3/2x+4
Thank you for your time
Sincerely,
Maggs

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
find the LCD for the given rational expression and convert each rationalexpression into an equivalent rational expression with the LCD as the denominator.
64) 4/x-y, 5x/2y-2x
Factor where you can:
5/(x-y), 5x/-2(x-y)
LCD = -2(x-y)
Rewrite each expression with the LCD as its denominator:
4(-2)/LCD , 5x/LCD
---------------------------
70) 3/4b^2-9,2b/2b+3,-5/2b^2-3b
Factor where you can
3/[(2b-3)(2b+3)], 2b/(2b+3), -5/[b(2b-3)]
LCD = b(2b+3)(2b-3)
Rewrite each expression with the LCD as it denominator:
3b/LCD, 2b(b)(2b-3)/LCD, -5(2b+3)/LCD
-------------------------
69) -5/6x-12,x/x^2-4,3/2x+4
Factor the denominators.
Select the LCD
Rewrite each expression with the LCD as its denominator.
-------------
Cheers,
Stan H.

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