七年级下册数学题 (x+y)的平方 乘以(-x-y)的立方 这题要给孩子怎么讲解...
首先要知道:(x+y)^2(意思就是:(x+y)²)=(-x-y)^2 (x+y)^3= - (-x-y)^3 为什么呢?(-x-y)^2= [ - (x+y)]^2= (x+y)^2 (-x-y)^3= [-(x+y)] ^3 = - (x+y)^3 所以: (-x-y)^n(n是偶数)= (x+y)^n (-x-y)^n(n是奇数)= -(x...
(x+y)^3-(x-y)^2(x+y)因式分解
原式为:(x+y)³-(x-y)²(x+y)=(x+y)(x+y)²-(x+y)(x-y)²=(x+y)【(x+y)²-(x-y)²】=(x+y)2x2y =4xy(x+y)
[(x+y)^2(x-y)]^3.
[(x+y)^2(x-y)]^3 =(x+y)^6(x-y)³
分解因式(x+y)^2(x-y)+(x+y)(x-y)^2
2014-10-26 (x+y)^2-x-y分解因式 2017-11-14 分解因式:m(x-y)^2-x+y 2 2016-09-17 分解因式X+y+(X+y)²+2 2016-06-23 x(x+y)(x-y)-(x+y)2次方 用因式分解 1 2015-04-22 因式分解 x(x-y)^2+x(x+y)(y-x)+2(x-... 2015-05-09 4(x+y)^2-4(x+y)(x-y...
(x+y)^3(x+y)^2-(-x-y)
(x+y)^3(x+y)^2-(-x-y)=(x+y)^5+(x+y)=(x+y)[(x+y)^4+1];请采纳 如果你认可我的回答,敬请及时采纳,~如果你认可我的回答,请及时点击【采纳为满意回答】按钮 ~~手机提问的朋友在客户端右上角评价点【满意】即可。~你的采纳是我前进的动力 ~~O(∩_∩)O,记得好评和采纳...
(x+y)^2(x+y)^3 这个怎么算啊
[8(x+y)^3(y-x)]^3除以[4(x+y)^2(x-y)]^2=[8(x+y)^3(y-x)]^3除以[4(x+y)^2(y-x)]^2=2(x+y)(y-x)=2(y^2-x^2)
(x+y)^3-(x-y)^2(x+y)分解多项式
(x+y)³-(x-y)²(x+y)=[(x+y)²-(x-y)²](x+y)=[(x+y)+(x-y)][(x+y)-(x-y)](x+y)=(2x)(2y)(x+y)=4xy(x+y)很高兴为您解答,祝你学习进步!【学习宝典】团队为您答题。有不明白的可以追问!如果您认可我的回答。请点击下面的【选为满意回...
(x-y)^3-(y-x)^2 因式分解
你明白什么是因式分解吗?就是把加减的式子换成乘积的形式哈。经常有这样的题,看似没有公因式,其实,公因式是一个相反数,及x-y与y-x,只差一个负号 所以原式=(x-y)^3-【-(x-y)】^2=(x-y)^3-(x-y)^2=(x-y)^2*(x-y-1)...
计算:{(x-y)^2·(y-x)^3}^2+(y-x)^3·(x-y)^7
计算:{(x-y)^2·(y-x)^3}^2+(y-x)^3·(x-y)^7 我来答 分享 复制链接http:\/\/zhidao.baidu.com\/question\/615907452147555892 新浪微博 微信扫一扫 举报 1个回答 #热议# 国际油价闪崩,大幅度下跌是何缘故?三叶草shuying 2014-03-04 · TA获得超过8812个赞 ...
(x+y)的三次方(x-y)的二次方-(x-y)(x+y)(x的二次方+y的二次方)_百度知...
问题疑为:(x+y)^3(x-y)^2-(x+y)(x-y)(x^2-y^2)(x+y)^3(x-y)^2-(x+y)(x-y)(x^2-y^2)=(x+y)^3(x-y)^2-(x+y)^2(x-y)^3 =(x+y)^2(x-y)^2[x+y-x+y]=2y(x+y)^2(x-y)^2