4/3x-2y+3/2x-5y=10 和 5/3x-2y-2/2x-5y=1方程组的解

已知X,Y,满足(X+3Y)(X-3Y)=-10(Y^2-6/5)和2X(Y-1)+4(1/2X-1)=0 （X+Y)^2 X^2Y+XY^2注：*/* 是分数 5x+y=2,x-3y=4,求x和y, 5x+y=2 x-3y=4 求x和y (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian 5x^3y(x-y)^3-10x^4y^3(y-x)^2因式分解 5x^3y(x-y)^3-10x^4y^3(y-x)^2 5X^3Y(X-Y)-10X^4Y^3(Y-X)^2因式分解 3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27 5X+Y=3 X+5Y=2 求x和y.5X+Y=3X+5Y=2求x和y. 先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5 (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= x+y=1 5x-2y=8 3x-y=7 2x-y=3x表示y和用y表示x 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y) 化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1 5x+10=5y 4x+4y=8要求x、y 2.结算：（2x-3y)^2-(y+3x)(3x-y) 利用乘法公式计算和分解因式