2(x-2y)-6(x-2y)+3(x-2y)合并同类项
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2(x-2y)-6(x-2y)+3(x-2y)合并同类项
2(x-2y)-6(x-2y)+3(x-2y)合并同类项
2(x-2y)-6(x-2y)+3(x-2y)合并同类项
原式=(2x-4y)-(6x-12y)+(3x-6y)=2x-4y-6x+12y+3x-6y=2y-x
-1(X-2Y)
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)]
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y(x+y)+(x-y)²-x²-2y²
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