JJ99 JJ99
  • 10-06-2016
  • Mathematics
contestada

solve.
x/x-2+x-1/x+1=-1

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caylus
caylus caylus
  • 10-06-2016
Hello,

We suppose x≠2 and x≠1.

x/(x-2)+(x-1)(x+1)=-1
==> (x²+x-(x²-x-2x+2))/(x²-x-2)=-1
==>4x-2=-x²+x+2
==>x²+3x-4=0
==>(x+4)(x-1)=0
Sol ={-4,1} which are different of the excluded values.
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