25(x+y)^2-9(x-y)^2

x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 化简y(x+y)+(x+y)(x-y)-x^2 9(x-y)-12(y-x)^2 (x+y)^2+6(x+y)+9 (x+y)^2-9(x+y)+18 (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 因式分解x(x+y)(x-y)-x(x+y)^2 9(x+2y)^2-25(x-2y)^2 因式分解:9(x-y)^2-25(x+y)^2 25(x+y)^2-9(x-y)^2 因式分解25(x +y)^-9(x-y)^2十字相乘 9(x-y)^2-30(x-y)+25 因式分解 [(x-y)^2-(x+2y)(x-2y)]/y 计算:y-x分之x+y+x-y分之y-y-x分之2x-y 计算.25(x+y)^2-0.81(x-y)^20.25(x+y)^2-0.81(x-y)^2 . (x-2y)^2-6(2y-x)(x+y)+9(x+y)^2因式分解 25(x-y)*2+10(y-x)+125（x-y)^2+10(y-x)+1