4y^4-4x^3+0.2x^2y^2+xy^3-1/5x^2y^2-4y^4-x^3y,其中x=-2,y=0.3.

xczvh2jk3hkjfash2022-10-04 11:39:541条回答

已提交,审核后显示!提交回复

共1条回复
等待梦中 共回答了21个问题 | 采纳率95.2%
4y^4-4x^3+0.2x^2y^2+xy^3-1/5x^2y^2-4y^4-x^3y
=-4x^3+xy^3-x^3y
=-4×(-2)^3+(-2)×0.3^3-(-2)^3×0.3
=32-0.054+2.4
=34.346
1年前

相关推荐