①（11x+y)(11x-y)-(11x+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 (x-y)^2+7(x+y)-11(x-y)^2-8(x+y),先化简.再求值 (x-y)的平方+7（x+y)-11（x-y)的平方-8（x+y) （x-y)^2+7(x+y)-11(x-y)^2-8(X+Y)的计算过程 求做因式分解12(x+y)^2+11(x+y)(x-y)+2(x-y)^2 6(x+y)的平方-11(x+y)(x-y)+3(x-y)的平方=? 3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9 ①（11x+y)(11x-y)-(11x+y)² 若x,y是正整数,且满足x(x+y)-y(x+y)=11求x+y的值 若x、y为正整数,且满足x(x+y)-y(x+y)=11,求x,y的值 [(y*y*y-y)/(xy+1)*(xy+1)-(x+y)*(x+y)]/[(x+y)*y/(x+1)]其中x=-11,y=1/12,化简再求值. 已知x+y/x=11/8,求x-y/x+2y的值 已知x+y/y=11/8,求x-y/x+2y的值. (x+y)(x+2y)(x+3y)(x+4y)=-40y的值为根号11 (2x-y)(y+2x)-2(3x+2y)(-2y-3x)-(11x-3y)*(2x+3y) 根据3（x+y)-2(x-y)=11,4(x+y)+3(x-y)=9可得出x+y= ,x-y= (y+2x)(2x-y)-2(3x-2y)·(-2y-3x)-(11x-3x)(2x-3y)