2X^2+4xy+y^2

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2X^2+4xy+y^22X^2+4xy+y^22X^2+4xy+y^2=2x^2+4xy+2y^2-y^2=2(x+y)^2-y^2=（根号2x+根号2y+y)(根号2x+根号2y-y)2x^2+4

2X^2+4xy+y^2
2X^2+4xy+y^2

2X^2+4xy+y^2
=2x^2+4xy+2y^2-y^2
=2(x+y)^2-y^2
=（根号2x+根号2y+y)(根号2x+根号2y-y)

2x^2+4xy+y^2
=4x^2+4xy+y^2-2x^2
=(2x+y)^2-2x^2
=(2x+y-√2x)(2x+y+√2x)

(x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy) 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) (x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1) 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] 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（-3x^y+2xy)-( )=4x^+xy (x^-4y^)/(x^+2xy+y^)/(x+2y)/(2x^+2xy) 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 3(x^2y+xy)-4(xy-2x^2y)-(-xy) 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) 当x-y=2xy时,求4x-3xy-4y/xy XY(XY+3)+(XY+4)+4(X+Y+1)-(X+Y+2) 3（x平方y+xy)-4(xy-2x平方y)-(xy) 1-2/x+y=xy,4y+6x=xy.求xy的解? x^2-xy/xy-y^2约分计算:2xy/(x+y)².(x+y)/4y