a/2=b/3≠0得
3a=2b
(5a-2b)/(a²-4b²)×(a-2b)
=(5a-2b)/[(a+2b)(a-2b)]×(a-2b)
=(5a-2b)/(a+2b)
将3a=2b代入得
原式=(5a-3a)/(a+3a)=1/2
愿对你有所帮助!
a/2=b/3≠0得
3a=2b
(5a-2b)/(a²-4b²)×(a-2b)
=(5a-2b)/[(a+2b)(a-2b)]×(a-2b)
=(5a-2b)/(a+2b)
将3a=2b代入得
原式=(5a-3a)/(a+3a)=1/2
愿对你有所帮助!