作业帮(x+3y)(x^2+9y^2)(x-3y)帮帮忙,我很急,请在今天给我答复,O(∩_∩)O谢谢
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(x+3y)(x^2+9y^2)(x-3y)帮帮忙,我很急,请在今天给我答复,O(∩_∩)O谢谢
(x+3y)(x^2+9y^2)(x-3y)
帮帮忙,我很急,请在今天给我答复,O(∩_∩)O谢谢
(x+3y)(x^2+9y^2)(x-3y)帮帮忙,我很急,请在今天给我答复,O(∩_∩)O谢谢
=(x+3y)(x-3y)(x^2+9y^2)
=(x^2-9y^2)(x^2+9y^2)
=x^4-81y^4
(x+3y)(x^2+9y^2)(x-3y)
=(x+3y)(x-3y)(x^2+9y^2)
=(x^2-9y^2)(x^2+9y^2)
=x^4-81y^4
x(x-y)2-(y-x)3
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