-6x^2y×(a-b)^3×1/3xy^2(b-a)^2

2x/x+y+2y/x+y a/a+b+b/a-b 1/3x²+2/4y-5/6xy解出来快 已知A=8x^2y-6xy^2-3xy,B=7xy^2-2xy+5x^2y求A-B 已知A=X-2y+2xy,B=3x-6y+4xy 求3A-B -6x^2y*(-a-b)^3*1/3xy^2*(b+a)^2计算 -6x^2y×(a-b)^3×1/3xy^2(b-a)^2 已知6x^2-7xy-3y^2+14x+y+a=(2x-3y+b)(3x+y+1),则a=?,b=? 再问道因式分解题x^3(a+1)-xy(x-y(a-b)+y^3(b+1)还有x^2-y^2+2x+6y-8 已知:6x²-7xy-3y²+14x+y+a=(2x-3y+b)(3x+y+1)求a,b的值 已知:6x²-7xy-3y²+14x+y+a=(2x-3y+b)(3x+y+1)求a,b的值 因式分解30题(要过程)am+an+bm+bn x^2+5y-xy-5x x2+xy+2xz+x (a+b)x-(b+a)y -12x(x-y)-(y-x)x^2 2x^2+4x+2 x(x+z)-y(y+z) 2(x^2-3ab)+x(4a-3b) 4x^2+12xy+9y^2-25 x^4-16 16x^4-1 x^2+9x+8 x^2-10xy+24y^2 2x^2+15xy-8y^2 3x^2-6xy+3y^2 24x^2+22x-21 -x^2+4xy- 已知a=x^+xy+y^ b=-3xy-x^求2A-3B 已知A=5x²y-3xy²+4xy；B=7xy²-2xy+x²y,且x+y=2,x-y=0,化简求-1/2（A+B)-A. 1.b^2+4a(b+a)2.9x^2y+y^3-6xy^2 已知A=2x²+3xy-2x-1,B=-x²+xy-1,3A+6B的值与x无关,求y a=2x^2+2xy-2x-1, b=x^2-xy+1, 3a-6b与x无关 ,求y 设A=x-xy,B=xy+y²,求：（1）A+B（2）3A-B -4x^2y-8xy^2+2x^2y-3xy^2 合并同类项-4x^2y-8xy^2+2x^2y-3xy^2 3x^2-1-2x-5+3x-x^2 -0.8a^2b-6ab-1.2a^b+5ab+a^2b 5yx-3x^2y-7xy^2+6xy-12xy+7xy^2+8x^2y 合并同类项 求代数式1/2(a-b)^2+1/4(a+b)-1/3(a-b)^2-1/5(a+b)的值,其中a=-1 b=1/2. 如果x^ 已知：A=X*X-3xy+y*y,B=2x*x+xy-3y*3y.求A+B,A-B,A+2B