x(x-1)(x+3)-x2(x+1)+3x-1
(x2+3x+9)/(x2-27)+(6x)/(9x-x2)-(x-1)/(6+2x)
(x-2)(x2-6x-9)-x(x-5)(x-3)其中x= -1/3
2x-(3x-1)+2(x2)
函数f(x)=(x2+2x-3)/(x-1) (x>1) ax+1 (x
(x-6)(x2+x+1)-x(2x+1)(3x-1)
x2+3x+9/x2-27+6x/9x-x2-x-1/6+2x 化简
化简x2+3x+9/x2-27+6x/9x-x2-x-1/6+2x
x2(3-x)+x(x2-2x)+1,其中x=根号3
解方程:1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x
解方程 x2+x-1/(x2+x)=3/2
因式分解:1.(x2+x-6)(x2+x-8)-242.(x+1)(x-2)(x-3)(x-6)+203.(x+1)(x
x · 根号(X2+3X+18) - X · 根号(X2-6X+18)=1 那么2X · 根号(X2-6X+18)-9X