(3x-1)(x-1)=(4x+1)(x-1)
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(3x-1)(x-1)=(4x+1)(x-1)(3x-1)(x-1)=(4x+1)(x-1)(3x-1)(x-1)=(4x+1)(x-1)3x^2-3x-x+1=4x^2-4x+x-13x^2-4x+
(3x-1)(x-1)=(4x+1)(x-1)
(3x-1)(x-1)=(4x+1)(x-1)
(3x-1)(x-1)=(4x+1)(x-1)
3x^2-3x-x+1=4x^2-4x+x-1
3x^2-4x+1=4x^2-3x-1
x^2+x-2=0
(x-1)(x+2)=0 解得x1=1 x2=-2
3x²-3x-x+1=4x²-4x+x-1
x²+x-2=0
(x-1)(x+2)=0
x=1 x=-2
3/x-1=4/x 6/x+1=x+5/x(x+1)
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