查人人中国名人网全国铁路地图:一道数学题
来源：百度文库 编辑：查人人中国名人网 时间：2024/05/11 17:11:52
(x^4-2x^2y^2+y^4)/(x+y)^2/(x-y) 为何等于 x-y?
请写出过程
请写出过程
(x^4-2x^2y^2+y^4)/(x+y)^2/(x-y)
=(X^2-y^2)^2/(X+Y)^2/(X-Y)
=[(X+Y)(X-Y)]^2/(X+Y)^2 /(X-Y)
=(X+Y)^2(X-Y)^2/(X+Y)^2/(X-Y)
=(X-Y)^2/(X-Y)
=X-Y
不是都说自己的小狗就和自己的孩子差不多吗？
母随母：例如，你或你的女友叫王丽，你可叫它丽丽，
父随父：同上
(x^4-2x^2y^2+y^4)/(x+y)^2/(x-y)
=(X^2-y^2)^2/(X+Y)^2/(X-Y)
=[(X+Y)(X-Y)]^2/(X+Y)^2 /(X-Y)
=(X+Y)^2(X-Y)^2/(X+Y)^2/(X-Y)
=(X-Y)^2/(X-Y)
=X-Y
x^4-2x^2y^2+y^4)/(x+y)^2/(x-y)
=(X^2-y^2)^2/(X+Y)^2/(X-Y)
=[(X+Y)(X-Y)]^2/(X+Y)^2 /(X-Y)
=(X+Y)^2(X-Y)^2/(X+Y)^2/(X-Y)
=(X-Y)^2/(X-Y)
=X-Y
(x^4-2x^2y^2+y^4)/(x+y)^2/(x-y)
=(X^2-y^2)^2/(X+Y)^2/(X-Y)
=[(X+Y)(X-Y)]^2/(X+Y)^2 /(X-Y)
=(X+Y)^2(X-Y)^2/(X+Y)^2/(X-Y)
=(X-Y)^2/(X-Y)
=X-Y