x-4分之x-2,怎么会分母是x-2?
(x-4)/(x-2)+4/x(x-2)
=x(x-4)/x(x-2)+4/x(x-2)
=(x²-4x+4)/x(x-2)
=(x-2)²/x(x-2)
=(x-2)/x
=x分之x-2
其中分子是x-2,分母是x
x-4分之x-2,怎么会分母是x-2?
(x-4)/(x-2)+4/x(x-2)
=x(x-4)/x(x-2)+4/x(x-2)
=(x²-4x+4)/x(x-2)
=(x-2)²/x(x-2)
=(x-2)/x
=x分之x-2
其中分子是x-2,分母是x