若（4X²-8xY+3Y-9)²+|5X+3|=0,求5（4X²-8XY+3Y-1)与X²+8XY-3Y+2的值

若（4X²-8xY+3Y-9)²+|5X+3|=0,求5（4X²-8XY+3Y-1)与X²+8XY-3Y+2的值 已知2X²+XY=A,3Y²-2XY=B,求4X²+8XY-9Y²的值 已知2x²+xy=10,3y²+2xy=6,求4x²+8xy+9y²的值 3x²-y²=8x²＋xy＋y²=4 分解因式：2x²-8xy+5y²6x²-9x-4242x²-85xy+42y²3x²-5xy-y²(2x-y+3)(2x-y+1)-15(x+y)²+4(x+y)(3x-y)+4(3x-y)²完全按照原题打的 求3x²+8xy-3y²-3xy+4y²-3x² 若x²+xy-2y²=0,则x²+3xy+y²/x²+y² 计算：4xy²-3x²y-{3x²y-[2xy²-4x²y+2(x²y-2xy²)]急 6道数学因式分解（1）2x(x-y)四次方-x²(x-y)²+xy(y-x)²（2）8a三次方-b三次方（3）4（x-y+1）+y(y-2x)(4)3x²+5xy-2y²+x+9y+4(5)2x²+xy-y²-4x+5y-6(6)3x²+4xy-y² 若3x-4xy+y²等于-3,2x²+3xy-2y²等于 8,求5x²-18xy+7y²等于几 几道分解因式的题,2X²-4X= 8m²n+2mn=a²x²y-axy²=-2x²/12xy²+8xy³=9(m+n)²-(m-n)²=2x³-8x=x²+14x+49=3ax²+6axy+3ay²=-2x²/12xy²+8xy³=输入错误，应该是-2x² 1.(8xy-x²+y²)-(x²-y²+8xy)2.(2x²-1/2+3x)-4(x-x²+1/2)3.3x²-[7x-(4x-3)-2x²] 6x²y-9xy-xy²+3x²y 已知x²-xy=-3,2xy-y²=-8,求代数式2x²+4xy-3y²的值 已知：x²-xy=1,4xy-3y²=-2,求x²-9xy+6y²-5的值 已知2x²+xy=10,3y²+2xy=6,求4x²+8xy+y²的值 已知x+y=8,xy=4,求x²+xy+3y²/x²y+3xy的值 若x/y=2,求7x²-3xy+2y²/2x²-3xy+7y²的值 答案是8/3