当3x+5分之x+3的值为0时,求分式x²-2x-3分之x-3的值

问题描述:

当3x+5分之x+3的值为0时,求分式x²-2x-3分之x-3的值

(x+3)/(3X+5)=0
=>x=-3
(x-3)/(x²-2x-3)=(x-3)/((x-3)(x+1)=1/(x+1)=-1/2