Math Is Fun Forum

4littlepiggiesmom

Member

Registered: 2006-01-09

Posts: 42

Solving Radical Equations

1. 8/(x+4) +1 = 5x/(x^2-2x-24)

2. 2x(x+3) -  x/(x+7) = (x^2-1)/(x^2+10x+21)

Any one able to show me where to start after figuring out the LDC would be my hero for the day!

The LDC for 1 is (x-6)(x+4)
and far 2 it's (x+3)(x+7) correct?

4littlepiggiesmom

Member

Registered: 2006-01-09

Posts: 42

Re: Solving Radical Equations

First ones answer is x= 8 and -9...corret ??? but the other one I can get anywher with is at alk..
I get this
(2x)(x+7) - (x) (3+3) = (y^2 -1)
then I get (2x^2 +14 x)(x-3x) = (y^2 -1) but then I keep getting zero on both side???? Help please!!!

George,Y

Member

Registered: 2006-03-12

Posts: 1,379

Re: Solving Radical Equations

2x(x+7)-x(x+3) = x²-1
x(2x+14-x-3)=x²-1
11x=-1
x=-1/11

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X'(y-Xβ)=0