计算[(x²-5x+6)/(x²-4x+3)]+[(x²-4x+3)/(x²-2
计算[(x²-5x+6)/(x²-4x+3)]+[(x²-4x+3)/(x²-2
计算①x²-4/x²-4x+3÷x²+3x+2/x²-x②2x+6/4-4x+x
分式计算x²+2x/x²-6x+9÷x²-4/x²-3x
分式计算:x²+2x/x²-6x+9÷x²-4/x²-3x
计算:2X²-5X+X²+4X-3X²-2
计算:(3/x)+(x/x²-1)-(4/1-x)
计算:(x²-2x-8)分之(2-x)+(3x+6)分之(x+4)
计算: (x+3)(x²-x-2)
计算 (x+3)(x²-x-2)
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
计算x²+4/x+3+x²-x-6/x+3-2x²-2x-5/x+3=
计算x²-4/x²-x-2 乘以 x²-x/x²+3x+2