{x^2-3xy+2y^2+4x+3y=1 {2x^2-6xy+y^2+8x+2y=3{x^2-3xy+2y^2+4x+3y=1{2x^2-6xy+y^2+8x+2y=3

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${x^2-3xy+2y^2+4x+3y=1 {2x^2-6xy+y^2+8x+2y=3{x^2-3xy+2y^2+4x+3y=1{2x^2-6xy+y^2+8x+2y=3$

{x^2-3xy+2y^2+4x+3y=1 {2x^2-6xy+y^2+8x+2y=3{x^2-3xy+2y^2+4x+3y=1{2x^2-6xy+y^2+8x+2y=3
{x^2-3xy+2y^2+4x+3y=1 {2x^2-6xy+y^2+8x+2y=3
{x^2-3xy+2y^2+4x+3y=1
{2x^2-6xy+y^2+8x+2y=3

{x^2-3xy+2y^2+4x+3y=1 {2x^2-6xy+y^2+8x+2y=3{x^2-3xy+2y^2+4x+3y=1{2x^2-6xy+y^2+8x+2y=3
（5）第一个方程两边乘2,得2x²-6xy+4y²+8x+6y=2,减去第二个方程,得3y²+4y+1=0,解得y=-1/3或-1.当y=-1/3时,代入第一个方程,解得x=1/3或-16/3；当y=-1时,代入第一个方程,解得x=（√57-7）/2或（-√57-7）/2
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因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) （-3x^y+2xy)-( )=4x^+xy x^2-4xy+3y^2=（x-3y)(x-y)x^2-4xy+3y^2 怎么分解成（x-3y)(x-y) 当x-y=2xy时,求4x-3xy-4y/xy 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________? 已知x-y=4xy,求2x+3xy-2y/x-2xy-y的值 x-y=4xy,试求2x+3xy-2y/x-2xy-y 已知x-y=4xy,求x-2xy-y分之2x+3xy-2y的值! x-y=4xy,试求2x+3xy-2y/x-2xy-y 诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy) 已知x-y=3xy,求5x+2xy-5y/x-4xy-y的值若x-y=4,xy=1,求(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值若x-y=4,xy=1,则(2x+y-2xy)-(3x+2y+xy)-(4xy+3y-5x)= x-y=1,xy=2.求：(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值 .已知:x-y=1,xy=-2.求:(-2xy+2 x+3y)-(3xy+2y-2x)-(x+4y+xy)的值 x^+2xy+y^+4=16 x^-2xy+y^=16 求(3xy+6y^)+|x^-(2xy+2y^-3x^)|的值 (-2xy+2x+5y)-(3xy+2y-2x)-(x+4y+xy)其中x-y=4xy=-1