2x/x+y+2y/x+y a/a+b+b/a-b 1/3x²+2/4y-5/6xy
已知:6x²-7xy-3y²+14x+y+a=(2x-3y+b)(3x+y+1)求a,b的值
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|+
因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)(
A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²+3x-y,若x=
设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²-3x-y,若x
已知:A=X*X-3xy+y*y,B=2x*x+xy-3y*3y.求A+B,A-B,A+2B
x²(x+y)(y-x)-xy(x+y)(x-y) 已知a+b=4,ab=-2,求多项式3a²b+3
若A=2x²-4xy-2y²-2x+2y,B=4x²-6xy+2y²-3x-y.
设A=2X²-3xy+y²-x+2y,B=4x²-6xy+2y²-3x-y,若|
设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²+3x-y 若|
设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²-3x-y,若│
1.设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²-3x-y,