(2m-n)ˆ(2m+n)ˆ2(nˆ2+4mˆ2)ˆ2(x+y)ˆ2(x-y)ˆ2-(x-y)(x+y)(xˆ2+yˆ2)
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/05 14:39:34
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(2m-n)ˆ(2m+n)ˆ2(nˆ2+4mˆ2)ˆ2(x+y)ˆ2(x-y)ˆ2-(x-y)(x+y)(xˆ2+yˆ2)
(2m-n)ˆ(2m+n)ˆ2(nˆ2+4mˆ2)ˆ2
(x+y)ˆ2(x-y)ˆ2-(x-y)(x+y)(xˆ2+yˆ2)
(2m-n)ˆ(2m+n)ˆ2(nˆ2+4mˆ2)ˆ2(x+y)ˆ2(x-y)ˆ2-(x-y)(x+y)(xˆ2+yˆ2)
第一道全是幂的形式么、没看懂
第二道=(x+y)(x-y)(x+y)(x-y)-(x^2-y^2)(x^2+y^2)=(x^2-y^2)(x^2-y^2)-(x^2-y^2)(x^2+y^2)=(x^2-y^2)(x^2-y^2-x^2-y^2)=-2y^2(x^2-y^2)