(1)(x+y)^2-(x-y)^2(2)(-3/5x^2y^3)/(3x^2y)(3)(10a^4b^3c^2)/(5a^3bc)(4)(2a+b)^4/(2a+b)^2(5)(16x^2y^3z+8x^3y^2z)/(8x^2y^2)(6)(a+3)(a-3)-(a-1)(a+4)(7)(xy+1)^2-(xy-1)^2

来源：学生作业帮助网 编辑：作业帮 时间：2024/05/04 11:48:08
(1)(x+y)^2-(x-y)^2(2)(-3/5x^2y^3)/(3x^2y)(3)(10a^4b^3c^2)/(5a^3bc)(4)(2a+b)^4/(2a+b)^2(5)(16x^2y^3z+8x^3y^2z)/(8x^2y^2)(6)(a+3)(a-3)-(a-1)(a+4)(7)(xy+1)^2-(xy-1)^2

(1)(x+y)^2-(x-y)^2(2)(-3/5x^2y^3)/(3x^2y)(3)(10a^4b^3c^2)/(5a^3bc)(4)(2a+b)^4/(2a+b)^2(5)(16x^2y^3z+8x^3y^2z)/(8x^2y^2)(6)(a+3)(a-3)-(a-1)(a+4)(7)(xy+1)^2-(xy-1)^2
(1)(x+y)^2-(x-y)^2
(2)(-3/5x^2y^3)/(3x^2y)
(3)(10a^4b^3c^2)/(5a^3bc)
(4)(2a+b)^4/(2a+b)^2
(5)(16x^2y^3z+8x^3y^2z)/(8x^2y^2)
(6)(a+3)(a-3)-(a-1)(a+4)
(7)(xy+1)^2-(xy-1)^2

(1)(x+y)^2-(x-y)^2(2)(-3/5x^2y^3)/(3x^2y)(3)(10a^4b^3c^2)/(5a^3bc)(4)(2a+b)^4/(2a+b)^2(5)(16x^2y^3z+8x^3y^2z)/(8x^2y^2)(6)(a+3)(a-3)-(a-1)(a+4)(7)(xy+1)^2-(xy-1)^2
1)4xy 2)-1/5y^2 3)2ab^2c 4)(2a+b)^2 5)2yz+xz 6)-3a-5 7)4xy

20÷(1-4/9)=36个（球总个数） 36-20=16个（红球个数） 20÷（1-1/3)=30个（拿过后球总个数) 30-20=10(个）（拿过后红球个数） 16

[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y 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 (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 1、y-x/x²-y²2、(x-y)(y-z)(z-x)/(z-y)(y-x)(x-z) 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) (x-y)(2x-y-1) 因式分解x(x+y)(x-y)-x(x+y)^2 (x/x+y-x/y-x-2xy/x.x-y.y)/(1/x-1/y) 分式化简 x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x² [(x-y)^2-(x+2y)(x-2y)]/y 2y(x+二分之一y)-[(x+y)(x-y)+2y(y+x)],其中|x-1|=2 （x-y)(x+y)-(x+y)^2+2y(y-x),其中x=1,y=3. 计算:y-x分之x+y+x-y分之y-y-x分之2x-y 已知x+y=a,2x-y=-2a,求[（x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 [(-2x-y)^2-(2x+y)(2x-y)]÷2y-1/2y x^2(x-y)+(y-x)