(4x²y²)²÷8y²-(6x^6y^4-2x^2y^2)
(x-2y)²+(2x-4y)(x+y)+(x+y)²
因式分解 (1).(x+y)(x+y-6)+9 (2).x²-16y²-x-4y
(2x-y)²-4(x-y)(x+2y)
化简:(2x-y)²-4(x-y)(x+y)
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
【(2x+y)²-y(y+4x)-8x】÷2x,其中x=100
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
(3x-y)²-2x(4x-5y)-(x+2y)²
先化简,再求值:{(x+2y)(x-2y)+4(x-y)²}÷6x,其中x=12,y=3.
先化简,在求值:(x-y)²+(3x-2y)(2x+y)-x(6x-y)