Asked by Angelia
                3/2y-3/2y+4
=
rational expression reduce to lcd
            
        =
rational expression reduce to lcd
Answers
                    Answered by
            Reiny
            
    The way you typed it ....
3/2y-3/2y+4
= 4
If you meant ....
3/(2y-3) - 3/(2y+4) then
= (3(2y+4) - 3(2y-3))/((2y-3)(2y+4))
= (6y+12-6y+9)/((2y-3)(2y+4))
= 21/((2y-3)(2y+4))
    
3/2y-3/2y+4
= 4
If you meant ....
3/(2y-3) - 3/(2y+4) then
= (3(2y+4) - 3(2y-3))/((2y-3)(2y+4))
= (6y+12-6y+9)/((2y-3)(2y+4))
= 21/((2y-3)(2y+4))
                    Answered by
            drwls
            
    3/(2y) - 3/(2y+4) 
= [3(2y+4) -3(2y]/[(2y)(2y+4)]
= [6y +12 -6y]/[(2y)(2y+4)]
= 12/[(2y)(2y+4)]
    
= [3(2y+4) -3(2y]/[(2y)(2y+4)]
= [6y +12 -6y]/[(2y)(2y+4)]
= 12/[(2y)(2y+4)]
                    Answered by
            drwls
            
    I interpreted your problem differently from Reiny due to the ambiguous lack of parentheses. 
    
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