(2x+y)(x+3y-1)计算

分类: 作业答案 • 2021-12-23 20:03:31

问题描述：

(2x+y)(x+3y-1)计算

答

(2x+y)(x+3y-1)=2x^2+6xy-2x+xy+3y^2-y
=2x^2+7xy+3y^2-2x-y