化简求值:已知b-a=4,ab=-2,求代数式4a-3b-2ab-6a+5b-ab的值,(过程要很完整)

问题描述:

化简求值:已知b-a=4,ab=-2,求代数式4a-3b-2ab-6a+5b-ab的值,(过程要很完整)

4a-3b-2ab-6a+5b-ab
=-2a+2b-3ab
=2(b-a)-3ab
=8+6
=14