已知a-b=2,ab=-1,求(4a-5b-ab)-(2a-3b+5ab)的值。求详细解答过程!

2025-06-28 04:36:18
推荐回答(1个)
回答1:

(4a-5b-ab)-(2a-3b+5ab)
=4a-5b-ab-2a+3b-5ab
=2a-2b-6ab
=2(a-b)-6ab
=2*2-6*(-1)
=4+6
=10