-0.2x^(a+3)y^5+3y^(4+b)与1/2x^3y^4的次数相同,求a,b

(x-2y)^5=a0(x+2y)^5+a1(x+2y)^4*y+a2(x+2y)^3*y^2+a3(x+2y)^2*y^3+a4(x+2y)y^4+a (2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y) 因式分解：a(x-y)^2+b(y-x)^3 4(x-y)^2+8(y-x)(x+y)1.a(x-y)^2+b(y-x)^3 2.4(x-y)^2+8(y-x)(x+y) (1)x^2*x^8+x^13/x^3 (2)a^19/a^12/a^3 (3) (x-2y)^5/(2y-x)^3 (4)(x-y)^5/(x-y) (5)(x-y)^6/(y-x)^4 因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y) 5x-3y=-4ax+5y=a+2x+y=0 5a(x-y)^2+10a(y-x)^3 （1）x(x+10)-2(3x-2) 分解因式y(2y+1)-y(y-1)+1 2x(2x-y)+y(y-2x) 2y(y-2)-y(y-4)-1 x(x+8)-8(x+2) (a+2)(a-2)-5 （x-3)(a-2)-5 (x+3)(x+4)+4分之1 几道 数学题急啊 对了再加20分(x+y)^2-(x+y)^3(x-y)^2-(x-y)^3 (x-y)^2-(y-x)^32(x-y)-3(y-x)^24ab(a+b)^2-6a^2b(a+b)(x+y)(x-y)-(x+y)^28a(x-y)^2-4b(y-x)a=-5 a+b+c=-5.2求代数式a^2(-b-c)-3.2a(c+b)的值 因式分解:3a(x-y)-(x-y) 3a(x-y)-(y-x) 因式分解 多项式因式分解,(1)y(x-y)+x(x-y) (2)y(x-y)+x(y-x)(3)a(x-y)^2-b(y-x)^2 (4)a(x-y)^3-b(y-x)^3(5)a^2b(a-b)-ab^2(a-b) 初一下平方差公式计算(过程详细)(1).(3x+7y)(3x-7y0(2).(0.2x-0.3)(0.2x+0.3)(3).(mn-3n)(mn+3n)(4).(-2x+3y)(-2x-3y)(5).(-1/4x-2y)(-1/4x+2y)(6).x^2+(y-x)(y+x)(7).(a^n+b)(a^n-b)(8).(a+1)(a-1)(a^2+1)1).(3x+7y)(3x-7y) 3X-Y=a,x-3y=5-4a的解要x 3X-Y=a,x-3y=5-4a的解要x 1,(x+y)²-(x+y),2,（x-y）²-（x-y）³2,（x-y）²-（y-x）³ 用分解公因式算(1).2(x-y)-3(y-x)²（2）.4ad(a+b)²-6a²b(a+b)(3).(x+y)²(x-y)+（x+y)(x-y)²(4).2a(a-3)²-6a²(3-a)+8a(a-3)(5)2 {X+2Y/2+3X-Y/3=5{0.2(X+2Y)+0.8(3X-Y)=4 (1)4x(a+b)-3x²(a+b);(2)a(x-2y)-b(2y-x)-c(x-2y);(3)15a²(x-y)-5a(y-x);(4)(3x+y)(3x-y)-(x+3y)(y-3x);