a-b=3ab,则代数式2a-2b-ab/a-b+2ab的值是()
问题描述:
a-b=3ab,则代数式2a-2b-ab/a-b+2ab的值是()
答
2a-2b-ab/a-b+2ab
=(6ab-ab)/(3ab+2ab)
=5ab/5ab
=1在讲一下