JJ99
JJ99
10-06-2016
Mathematics
contestada
solve.
x/x-2+x-1/x+1=-1
Respuesta :
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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