2x^2+4xy+4y^2+6x+25最小值

因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 化成最简分式1.x²+xy-2y²/x²-xy-6y² 2.2xy-4/x²y²+3xy-10 3.2x²+xy-6y²/6x²-7xy-3y² 4.4-x²/xy-2y+x-2 xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2 （X-3xy+4xy-y）-[-2x-2（xy-3/2xy）-y]+6xy的过程 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) 设xy>=0,2x+y=6,求z=4x^2+3xy+y^2-6x-3y的最值 1-2/x+y=xy,4y+6x=xy.求xy的解? 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) 分式x/2y,y/3x*2,1/4xy的最简公分母 分式2/xy,3/x+y,4/x-y的最简公分母是什么 2X^+XY-Y^-4X+5Y-6 2x^+xy-y^-4x+5y-6=? (x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy) 诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy) (x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1) 化成最简分式:x²y²+3xy-10分之2xy-4 x^+2xy+y^+4=16 x^-2xy+y^=16 求(3xy+6y^)+|x^-(2xy+2y^-3x^)|的值 4x^2y-6xy^2+2xy因式分解