计算(a^2-4/a^2-4a+3)*(a-3/a^2+3a+2)
问题描述:
计算(a^2-4/a^2-4a+3)*(a-3/a^2+3a+2)
答
(a^2-4/a^2-4a+3)*(a-3/a^2+3a+2)
=(a+2)(a-2)/(a-1)(a-3)*(a-3)/(a+1)(a+2)
=(a-2)/(a-1)*1/(a+1)
=(a-2)/(a²-1)