**Find the value of a for which 2x^3 - ax^2 - 12x -7 has a repeated factor. So sorry this is very urgent as I have an Advanced Mah test tmw and I am very lost. Thanks so much!**

**Answer:**

**Find the value of a for which 2x^3 - ax^2 - 12x -7 has a repeated factor. So sorry this is very urgent as I have an Advanced Mah test tmw and I am very lost. Thanks so much!**

**Answer:**