Question 54721
resolution:
3/x^2 + 4x + 3 - 1/x^2 -9 =0;  
3/x^2 -1/x^2 + 4x - 6 =0; 
2/x^2 + 4x - 6 =0
2 + 4x^3 - 6x^2 =0
4x^3 - 6x^2 + 2 = 0
2(2x^3 - 3x^2 + 1)=0