1/1-x= -x/x-1 //*(1-x)
1=-x
x=-1
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x/x^+1=x //*(x^+1)
x=x(x^+1)
x=x³+x
x³=0
x=0
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x-3/2x-1=x-3/1-2x //* 2x-1
x-3=x-3
0=0
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7x-1/1-7x=1/x //*(1-7x)
7x-1=x(1-7x)
7x-1=x-7x²
7x²+6x-1=0
Δ=36-4*7*(-1)=36+28=64
√Δ=8
x1=-6-8 przez 14= -14/14=-1
x2=-6+8 przez 14=2/14=1/7
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x+1/x=0
x²+1=0
Δ=0-4*1*1=-4
Δ<0 brak rozw.
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x-1/2=8/x-1 //*(x-1)
x(x-1)-1/2 (x-1)=8 //*2
2x(2x-2)-1(2x-2)=16
4x²-4x-2x+2=16
4x²-6x-14=0 //:2
2x²-3x-7=0
Δ=9-4*2*(-7)=9-8*(-7)=9+56=65
√Δ= √65
x1=3-√65 przez 4
x2= 3+√65 przez 4