cíuu emmmmmm 1/x-3 + 2= 5/x-1 +x

1 bình luận về “cíuu emmmmmm 1/x-3 + 2= 5/x-1 +x”

1. 1/(x-3)+2=5/(x-1)+x

   <=>(1.(x-1))/((x-3).(x-1))+(2.(x-3).(x-1))/((x-3).(x-1))=(5.(x-3))/((x-1).(x-3))+((x-1).(x-3))/((x-1).(x-3))

   =>x-1+2.(x-3).(x-1)=5.(x-3)+(x-1).(x-3)

   <=>x-1+2x^2+6=5x-15+x^2-4x+3

   <=>x+2x^2-5x-x^2+4x=-15+3+1-6

   <=>x^2=19

   <=>x=+-\sqrt{19}

   Vậy: S={+-\sqrt{19}}

    

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