(1/3√x^2y)*(-1/4√y^2/x)/(1/6√x^2y)
化简1) (-2x^ y^)(3x^ y^)(-4x^ y^)2) (6√x)\(3√x√x^5)3)已知函数f(x)的
数学题化简再求值(1/x-y+1/x+y)÷x^2 y^2/x^2-y^2,其中x=3,y=-√2
计算:(2/3x√9x+6x√y/x)+(y√x/y-√1/x)
已知x,y满足√(2x-3y-1)+√(x-2y+2)=0.求:2x-4分之5y的值
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
已知:3x=8y.求(1)x+y/y (2)2x+3y/x-2y
因式分解 (1).(x+y)(x+y-6)+9 (2).x²-16y²-x-4y
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
1) (x+y)^2-(x+y)^3 2) (x-y)^2-(x-y)^3 3)(x-y)^2-(y-x)^3 因式分解
(2X-Y)²-4(X-Y)*(X+Y)-(X-Y)*(X-1)
先化简再求值:(x-2y)²-(x+2y)(x-2y)-(x-3y)(x-y).其中x²+9y