3(x^2-1)^2+18(1-x^2)+27
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
求化简:(x^2+3x+9)/(x^2-27)+(6x)/(9x-x^2)-(x-1)/(6+2x)
化简(x^2+3x+9)/(x^3-27)+(6x)/(9x-x^2)-(x-1)/(6+2x)
1+x+x^2+x^3+.+x^99+x^100
x²+3x+9/(x²-27)+6x/(9x-x²)-(x-1)/(6+2x)
化简~(x²+3x+9/x²-27)+(6x/9x-x²)-(x-1/6+2x)
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)
x(x+1)^3+x(x+1)^2+x(x+1)+x+1因式分解
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)