计算:5ab-a²-2(ab-3a)²

问题描述:

计算:5ab-a²-2(ab-3a)²

5ab-a²-2(ab-3a)²
=5ab-a²-2(a²b²-6a²b+9a²)
=5ab-a²-2a²b²+12a²b-18a²
=5ab-19a²-2a²b²+12a²b如果对你有帮助,请采纳!祝你学习更上一层楼,数学独立团为您解决疑问!

Vfdhhbxn

5ab-a²-2(ab-3a)²=5ab-a²-2(a²b²-6a²b+9a²)=5ab-a²-2a²b²+12a²b-18a²=5ab-19a²-2a²b²+12a²b

5ab-a²-2(ab-3a)²
= 5ab-a²-2a²b²+12a²b-18a²
= 5ab-19a²-2a²b²+12a²b