1/3√x^4y×( -1/4√y²/x)÷(-1/6√x²y) (怎么算)
(三分之二x√9x +6x√x/y)+(y√y/x -x²√x/1)
化简1) (-2x^ y^)(3x^ y^)(-4x^ y^)2) (6√x)\(3√x√x^5)3)已知函数f(x)的
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
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)&
{4/(x+y)+6/(x-y)=3 {9/(x-y)-1/(x+y)=1
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
计算6x³y^6÷(1/2)y³÷(-3x²y)-(12x^4y^6-8x²y^
若实数x,y满足x的平方+2√3x+根号(x+y+1)+3=0,求代数式(1/x-y+1/x+y)÷y/(x²
(三分之二x√9x+6x√y/x) + ((y√x/y) -x²√1/x) 计算
已知x,y是实数,且(x+y-1)²与√2x-y+4互为相反数,求实数y的x方的倒数.
(x+y)和(x-y)各看成一个整体,合并同类项2(x+y)-3(x-y)²+3(x+y)+4(x-y)