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)+(x+y)(x-y)等于多少,求各路英雄好友帮帮忙吧.
x(x-y)+(x+y)(x-y)等于多少,求各路英雄好友帮帮忙吧.
x(x-y)+(x+y)(x-y)等于多少,求各路英雄好友帮帮忙吧.
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.
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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
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y(x+y)+(x-y)²-x²-2y²
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x+x+x-y-y=60 y+y+y-x-x=10 那么x=? y=?
(x+y)(—x+y)等于多少