|x+2y+3|+(2x+y)2=0请问x-y=?
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|x+2y+3|+(2x+y)2=0请问x-y=?|x+2y+3|+(2x+y)2=0请问x-y=?|x+2y+3|+(2x+y)2=0请问x-y=?我会
|x+2y+3|+(2x+y)2=0请问x-y=?
|x+2y+3|+(2x+y)2=0请问x-y=?
|x+2y+3|+(2x+y)2=0请问x-y=?
我会
|x+2y+3|+(2x+y)2=0请问x-y=?
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
请问,|x|=2 |y|=3则|x+y|=?
(2/3x-2/x+y(x+y/3x-x-y))÷x-y/x,其中5x+3y=0
(2x-y)乘(2x+y)+(2x-y)乘(y-4x)+2y(y-3x)
化简((X-2Y)的平方+(X-Y)(x+Y)-2(X-3Y)(X-Y))除以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)]
已知x/y=2/3,求3x-y/x+2y的值
先化简,再求值:【(X+2Y)(X-2Y)-(X+4Y)平方]除4Y,其中X=-2,Y=-3
3x(2x+y)-2x(x-y),其中x=1,y=1/5
{(x-y)²+(x+y)(x-y)}÷2x
先化简再求值 [(x-y)²+(x+y)(x-y)]÷2x,其中x=3,y=1
已知x和y满足x+3y+|3x-y|=19,2x+y=6,求x,y的值
设x,y满足x+3y+|3x-y|=19,2x+y=6则X= Y=
已知x+y=-2,试计算1/2(x+y)+4(x-y)-3(x-y)-3/2(x+y)-x+y的值
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
已知-x+2y=5则5(x-2y)-3(x-2y)-60
x平方+y平方-6x+2y+10=0,求(根号x+y)(根号x-y)的值