(1+x+3分之x-3)÷x方-9分之2x 你根本没分清
[1+(x-3)/(x+3)]÷2x/(x²-9)=2x/(x+3)×(x²-9)/2x=x-3
x-2分之x方×x方+2x分之2+x-x-2分之1
x²/(x-2)×(2+x)/(x²+2x)-1/(x-2)=x²/(x-2)×(2+x)/x(x+2)-1/(x-2)=x/(x-2)-1/(x-2)=(x-1)/(x-2)
x分之1-x-1分之一(x分之x方-1-x+1)
1/x-1/(x-1)?
(1+x+3分之x-3)÷x方-9分之2x 你根本没分清
[1+(x-3)/(x+3)]÷2x/(x²-9)=2x/(x+3)×(x²-9)/2x=x-3
x-2分之x方×x方+2x分之2+x-x-2分之1
x²/(x-2)×(2+x)/(x²+2x)-1/(x-2)=x²/(x-2)×(2+x)/x(x+2)-1/(x-2)=x/(x-2)-1/(x-2)=(x-1)/(x-2)
x分之1-x-1分之一(x分之x方-1-x+1)
1/x-1/(x-1)?