3x²-6x+3

(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3 X²-6x+9 x²-9 x+3 6x+(2x²-3x)-(x²-1) x²+3x+9/(x²-27)+6x/(9x-x²)-(x-1)/(6+2x) (2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3) 帮x²-x-6/x-/x-3/x²-5x+6 (x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简 计算①x²-4／x²-4x+3÷x²+3x+2／x²-x②2x+6／4-4x+x 约分 (X的平方+4x+3)(2x-x)^/(X^+X)(X^+X-6), 计算[(x²-5x+6)/(x²-4x+3)]+[(x²-4x+3)/(x²-2 分式计算x²+2x／x²-6x+9÷x²-4／x²-3x x²+9x/x²+3x+x²-9/x²+6x=9