求单项式2xy,6x方y方,-3xy,-4x方y方的和;
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求单项式2xy,6x方y方,-3xy,-4x方y方的和;求单项式2xy,6x方y方,-3xy,-4x方y方的和;求单项式2xy,6x方y方,-3xy,-4x方y方的和;2X方Y方-XY2x²
求单项式2xy,6x方y方,-3xy,-4x方y方的和;
求单项式2xy,6x方y方,-3xy,-4x方y方的和;
求单项式2xy,6x方y方,-3xy,-4x方y方的和;
2X方Y方-XY
2x²y²-xy
求单项式2xy,6x方y方,-3xy,-4x方y方的和;
化简求值,若X方-2XY+Y方+1XY-11=0,求X方+6XY+9Y方分之X方-25Y方*5X-25Y分之X+3Y的值
已知:3x方+xy-2y方=0,求(x+y/x-y + 4xy/y方-x方)除以 x方+2xy-3y方 / x方-9y方的值?
化简-(x方-2xy-y方)+(5x方-2xy-3y方)
已知3X方-xy-4y方=0,求分式xy-3x方/2y方-5xy-3x方的值
已知x分之y=3,求6x方-3xy+7y方分之3x方-4xy+2y方的值
3x-2y=0,求3xy-y方除以x方-2xy
x+4的绝对值+(y-1)方=0,求3x方-2xy-7x方+8xy+6x方的值
X-Y方=6 XY=2 求 3x²y-xy的立方
因式分解6x方y+3x立方y方+2/9xy方
已知x方+2xy-y方=7,求x方+y方的最小值
已知y分之x=3 求xy分之x方减y方除以xy-y方分之2(x-y)方的值
已知2X的平方-4xy=47,6xy+8y方=-19,求代数式3x方+8y方的值
若两个正实数x,y满足x方+2xy-3y方=0,求x方+xy+y方除以x方-xy+y方的值
((3/2x方+xy-3/5y方)*(-4/3x方y方)
(3/2x方+xy-3/5y方)*(-4/3x方y方)
若x/y=2/3,求3x方+5xy-2y方/x方-3xy-10y方的值
已知X的方+Y的方=7,XY=-2,求5X方—3XY—4Y方—11XY—7X方+2Y方的值