3m(a-2b)-a+2b 2a(a+b)-4a 4a(x-y)-(x-y)
因式分解:x^2y^2-4x a(a-b)-2b(b-a)
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
把(a+b)和(x+y)各看成一项,合并同类项:(1)4(a+b)+2(a+b)-(a+b); (2)3(x-y)^2-
已知|x-y-3|+(a+b+4)²=0,求2a+2b-(a+b)分之(x-y)²-3(y-x)的值
7(a-1)+x(a-1),3(a-b)²+6(b-a),2(m-n)²-m(m-n),x(x-y)
因式分解1.9(a+b)^2+12(a+b)+4 2.(a^3+4a^2+4a)÷(a^2+2a) 3.3(y-x)^2
因式分解:(1)x^2y^2-4x (2) a(a-b)-2b(b-a)
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
已知实数a,b,x,y,满足不等式(a+b)(x+y)>2(ay+bx),求证(x-y)/(a-b)+(a-b)/(x-
1)已知4X=5y,求(X+y):y 2)已知(a-b):(a+b)=3:7,求a:b
A.A+(4X+3Y)B.A+(4X+6Y) C.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