化简a-3分之a+2减a+2分之a-3除以a方-4分之a方-6a+9

问题描述:

化简a-3分之a+2减a+2分之a-3除以a方-4分之a方-6a+9

原式=(a+2)/(a-3)-(a-3)/(a+2)*(a-2)(a+2)/(a-3)^2
=(a+2)/(a-3)-(a-2)/(a-3)
=(a+2-a+2)/(a-3)
=4/(a-3)

(a+2)/(a-3)-(a-3)/(a+2)除以a^2-6a+9/a^2-4
=(a+2)/(a-3)-(a-3)/(a+2)除以(a-3)^2/(a+2)(a-2)
=(a+2)/(a-3)-(a-2)/(a-3)
=4/(a-3)