xy²-2xy+2y-4 怎么化简
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xy²-2xy+2y-4 怎么化简
xy²-2xy+2y-4 怎么化简
xy²-2xy+2y-4 怎么化简
xy²-2xy+2y-4=(xy²+2y)-(2xy+4)=y(xy+2)-2(xy+2)=(xy+2)(y-2)
xy²-2xy+2y-4 怎么化简
计算:4xy²-3x²y-{3x²y-[2xy²-4x²y+2(x²y-2xy²)]急
因式分解xy²-2xy+2y-4
分解因式xy²-2xy+2y-4
分解因式:xy²-2xy+2y-4
x²-4y²/x²+2xy+y²÷x+2y/2x²+2xy
6x²-xy-15y²=0 求x²-2xy+4y²/2x²-3xy-3y²告诉下
6x²-xy-15y²=0 求2x²-3xy-3y²分之x²-2xy+4y²
x²-2xy+y²-9
已知2x²-3y²=xy,(xy≠0),求值(4xy-x²)/(xy+2y²)的值
1 3x²+4xy-y²=2 4xy+1-4x²-y²=
已知x² -XY = 2,Y² -XY= 5,求x² - 4x Y+ Y² = 2x² + xY -3Y² = x² 已知x² -XY = 2,Y² -XY= 5,求x² - 4x Y+ Y² = 2x² + xY -3Y² = x² + xY- 2Y² =求x² - 4x Y+ Y² =
单项式2xy,6x²y²,-3xy,-4x²y²的和为--------------
求单项式2xy,6x² y²,-3xy,-4x²y²的和.
计算x²-x/x²×x/1-x和x²-4y²/x²+2xy+y²÷x+2y/x²+xy
已知x²+xy=3,xy+y²=—2,求x²-y²的值?x²+4xy+3y²的值?2x²-xy-3y
已知x-2y=3,x²-2xy+4y²=11,求①xy ②x²y-2xy²
整式乘法..1.3xy(x²y-xy²+xy)-xy²(2x²-xy+2x)2.(x-1)(x²-4x+3)-x(x²-5x+2)