x^3y-2x^2y^2+xy^3 2a^2-4ab+2b^2 12(a-b)^2-36(a-b)+27 9x^2-y^
3a-3b/10ab*25a^b3/a^-b^= x^-4y^/x^+2xy+y^/x+2y/2x^+2xy
x²(x+y)(y-x)-xy(x+y)(x-y) 已知a+b=4,ab=-2,求多项式3a²b+3
已知:A=X*X-3xy+y*y,B=2x*x+xy-3y*3y.求A+B,A-B,A+2B
分解因式1.2a(x-y)-3b(y-x)2.-x^y-2xy+35y3.a^(x-y)-4b^(x-y)若|a+2|+
几道因式分解..4ab(a+b)^2-6a^2b(a+b)(x+y)^2(x-y)+(x+y)(x-y)^22a(a-3
(x-A)*(B-y)=x^2-9xy+8y^2,求A,B
27x的3次方+54x平方y+36xy平方+8y的三次方 a平方+b平方+4a-4b-2ab+4
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
分解公因式的题 x(a-x)(a-y)-y(x-a)(y-a)-ab(a-b)^2+a(b-a)^2a^3b-ab2ab
因式分解2x²y-xy-3y (-a+b)+c²(a-b)
(x+y)(a-2b)
设A=2x-3xy+y+x-3y,B=4x-6xy+2y+4x-y,若|x-3a|+(y+3)=0,且B-2A=a.求A