计算 (a²+7a+10)/(a+2)²乘以(a²-4)/(a²-4a+4)除以(a+5)/(a-2)

问题描述:

计算 (a²+7a+10)/(a+2)²乘以(a²-4)/(a²-4a+4)除以(a+5)/(a-2)

(a+5)(a+2)/(a+2)^2 乘以(a^2-4)/(a-2)^2 乘以(a-2)(a+5)=(a^2-4)/(a-2)*(a+2)=1