化简(2x-3y)(3x-2y+1)
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化简(2x-3y)(3x-2y+1)
化简(2x-3y)(3x-2y+1)
化简(2x-3y)(3x-2y+1)
(2x-3y)(3x-2y+1)
原式=6x^2-4xy+2x-(9xy-6y^2+3y)
=6x^2-4xy+2x-9xy+6y^2-3y
=6x^2+6y^2-13xy+2x-3y
=6(x+y)^2-15xy+2x-3y
化简((X-2Y)的平方+(X-Y)(x+Y)-2(X-3Y)(X-Y))除以Y
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
2(x-y)²-3(x-y)(-y-x)
1/2x-(x+y/2x -x-y)÷(x+y)
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)]
化简:(x+y)+(2x+y/1*2)+(3x+y/2*3)+...+(9x+y/8*9)
(3x²-2x²-2y)÷(x+y) 化简【3x²-2x(x+y)+y(2x-y)】÷(x+y)其中x=1/2 y=1/3
(2x-y)+(x+3y)(x-3y)=
先化简再求值 [(x-y)²+(x+y)(x-y)]÷2x,其中x=3,y=1
(x/x+y +2y/x+y)乘以xy/ x+2y除以(1/x+1/y)(2)(3x^2/4y)^2乘以2y/3x+ x^2/2y^2除以2y^2/x
化简2x-(5x-3y)+(7x-y)
化简 求值 x-{-5x-[-y+(-x+3y)+x]},其中x=-1,y=-2;
化简:{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x
化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
化简(2x-3y)(3x-2y+1)
2(x+y)-3分之2(x-y)-3(x+y)+3分之2(x-y)化简 其中x=-2,y=1
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