2.原式=8xy-3y^2-5xy-6xy+4x^2
=8xy-3y^2+4x^2-11xy
=4x^2+8xy-3y^2-11xy
=4x^2-3xy-3y^2
第一题有问题
楼主没讲清楚第一题就是求那三个单项式加起来的和2x^2y^3+(-4x^2y^3)+(-3x^2y^3)原式=-5x^2y^3
1.求单项式2x^2y^3、-4x^2y^3与-3x^2y^3的和.2.计算(8xy-3y²)
1.求单项式2x^2y^3、-4x^2y^3与-3x^2y^3的和.2.计算(8xy-3y²)
1.求单项式2x^2y^3、-4x^2y^3与-3x^2y^3的和.
2.计算(8xy-3y²)-5xy-2(3xy-2x²)
1.求单项式2x^2y^3、-4x^2y^3与-3x^2y^3的和.
2.计算(8xy-3y²)-5xy-2(3xy-2x²)
数学人气:317 ℃时间:2020-01-09 11:37:01
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