x(x-y)+(x+y)(x-y)等于多少,求各路英雄好友帮帮忙吧.
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x(x-y)-y(y-x)+(x-y)²因式分解
x(x-y)+(x+y)(x-y)等于多少,求各路英雄好友帮帮忙吧.
(2x+y)²-y(y+4x)-8x等于?
X+Y=5 X×Y=-10 X和Y等于多少?
分解因式(x+y)3次方-y(x+y)平方+x平方(y+x)
把(x+y),(x-y)个作为一个整体合并同类项1,7(x+y)-2(x+y)-4(x+y)+2(x+y)2,(x-y)²+2(x-y)-(x-y)-2(x-y)²
把6x(x-y)的平方+3(y-x)的立方分解因式我知道答案是6x(x-y)^2+3(y-x)^3=6x(x-y)^2-3(x-y)^3=3(x-y)^2[2x-(x-y)]=3(x-y)^2(x+y)可为什么=6x(x-y)^2-3(x-y)^3=3(x-y)^2[2x-(x-y)]
-{-[-(x-y)]}+{-[(x+Y)]}
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(x+y)(x+y)-4(x+y-1)
因式分解:3(x+y)(x-y)-(x-y)²
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x(x+y)-y(3x-4y)因式分解.快.
y(x+y)+(x-y)²-x²-2y²
计算:(1)2/(x+y)+4y/x²-y²(2)x²/x+y-x+y
x+x+x-y-y=60 y+y+y-x-x=10 那么x=? y=?
(x+y)(—x+y)等于多少