a^2-1分之a-2除以(a-1-a+1分之2a-1),其中a是方程x^2-x=根号3的根

问题描述:

a^2-1分之a-2除以(a-1-a+1分之2a-1),其中a是方程x^2-x=根号3的根

(a-2)/(a²-1) ÷ (a-1)-(2a-1/a+1)=(a-2)/(a²-1) ÷ [(a+1)(a-1)-(2a-1)]/a+1)=(a-2)/(a²-1) ÷ (a²-2a/a+1)=[(a-2)/(a+1)(a-1)]x(a+1)/a(a-2)=1/(a²-a)a是方...