-4x^3+16x^2y^2-16xy^3

x^+2xy+y^+4=16 x^-2xy+y^=16 求(3xy+6y^)+|x^-(2xy+2y^-3x^)|的值 （12x^2y-8xy^2+16xy）/-3x+2y-4=? (12x^2y-8xy^2+16xy）/-3x+2y-4=? 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) 已知2x-3根号xy-2y=0(x>0),求x^2+4xy-16y^2/x^2+xy-9y^2 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] 下列因式分解中,正确的是：.A.-2x^3-3xy^3+xy=-xy(2x^2-2y^2+1).B.-x^2-y^2=-(x+y)(x-y)C.16x^2+4y^2-16xy=4(2x-y)D.x^2)y+2xy+4y=y(x+2)^2 （-3x^y+2xy)-( )=4x^+xy 因式分解30题(要过程)am+an+bm+bn x^2+5y-xy-5x x2+xy+2xz+x (a+b)x-(b+a)y -12x(x-y)-(y-x)x^2 2x^2+4x+2 x(x+z)-y(y+z) 2(x^2-3ab)+x(4a-3b) 4x^2+12xy+9y^2-25 x^4-16 16x^4-1 x^2+9x+8 x^2-10xy+24y^2 2x^2+15xy-8y^2 3x^2-6xy+3y^2 24x^2+22x-21 -x^2+4xy- 化简2(x²y+xy)-3(x²y-xy)-4x²y xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2 因式分解-x^3+2x^2y-xy^2和16(x-y)^2-9(x+y)^2和(x+2)（x+4）+x^2-4 （X-3xy+4xy-y）-[-2x-2（xy-3/2xy）-y]+6xy的过程 x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) 3(x^2y+xy)-4(xy-2x^2y)-(-xy) 当x-y=2xy时,求4x-3xy-4y/xy