3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y)要有过程
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3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y)要有过程3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y)要有过程3(x-y)-2(x+y)-5(x-y)+4(x
3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y)要有过程
3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y)要有过程
3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y)要有过程
3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y) = (3- 5 + 3) * (x-y) + (-2+4)(x+y) = (x-y) + 2(x+y) = x -y + 2x +2y = 3x + y
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2(x-y)²-3(x-y)(-y-x)
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)请帮我一下写两道计算题[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以(4x)
(x-y)(x-y)2(y-x) (x+2y-?)(x-2y+?)
先化简,再求值 [2/3x - 2/x+y(x+y/3x -x-y)]*x/x-y,其中5x+3y=0
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
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2分之x+y+3分之x-y;4(x+y)-(x-y)谢谢了,
3x+y=2 -y/x+y=123x+y=2 (-y/x)+y=12
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