1 （-6x+y)(-6x-y) 2 （-6x+y)(6x-y) 3（-6x+y)(x-6y)

因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)( {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 因式分解3x^2(x-y)+6x(y-x) 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 计算:(x-y)^2*(y-x)^2*(x-y)^6 6(x+y)2-2(x-y)(x+y)因式分解 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) 2(2x+3y)(3x+2y)-(6x-y)(2x-5y) x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20 {(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20 4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6 ｛4/(x+y)+6/(x-y)=3 ｛9/(x-y)-1/(x+y)=1