6x+(2x²-3x)-(x²-1)
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
6x+(2x²-3x)-(x²-1)
x²+3x+9/(x²-27)+6x/(9x-x²)-(x-1)/(6+2x)
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
x除x²+3x+2,-x除x²+2x+1与-1除3x+6
解方程:x(6-x)-2x(x+1)-(x^3-3x^4)/x²=4
2X²-X=6,4X²-3X-1=X-2,3X(X-3)=2(X-1)(X+1),
(2x²-2x+3)(-x³+x-1)
代数式6x+2x²-3x+x²+1,其中x=-5
(6x-4)(2x-1)(3x-1)(x-1)+x²
(2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3)
(x+1)/(x²+3x+2)+(x²-2x)/(x²-4)