3x(a-b)+2y(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
因式分解:x^2y^2-4x a(a-b)-2b(b-a)
因式分解2x²y-xy-3y (-a+b)+c²(a-b)
对于有理数a,b,定义:a*b=3a-2b,若x,y均为有理数,试计算【(x+y)*(x-y)】*2 x.
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-
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
3a(x+y)-2b(x+y)=(x+y)(?)
(x-A)*(B-y)=x^2-9xy+8y^2,求A,B
1)已知4X=5y,求(X+y):y 2)已知(a-b):(a+b)=3:7,求a:b
亲们,做下数学题1.(x+y)(a+2b)= 2.(a+b)(a-b)= 3.(a-b)(a-1/3)
3x(a-b)-2y(b-a) 因式分解