计算:(x-1/6y)(2x+1/3y)(3x^2+1/12y^2)
1.计算(a^2+a+1)(a^2-a+1) 2.计算(x-y)(x+y)+(3x-2y)(2x+y)-x(6x-y)
计算:(2/3x√9x+6x√y/x)+(y√x/y-√1/x)
计算:1/(x-y)-1/(x+y)-2y/(x^2+y^2)-4y^3/(x^4+y^4)-8x^7/(x^8+y^8
计算(4x^2-2x^3+6x)/(-2x)-(x-1)^2y^2-4/y^2-y-6)+(y+2/y-3)/(y+1/
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)(
(2x+y)(x+3y-1)计算
计算6x³y^6÷(1/2)y³÷(-3x²y)-(12x^4y^6-8x²y^
已知x=2+根号3,y=2-根号3,计算代数式(x+y/x-y-x-y/x+y)乘以(1/x^2-1/y^2)
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
计算:(-x-2y) * (3x-y)
数学用乘法公式计算(x+y+1)(x+y-1)(2x-y-3)²