Question 382703
I don't think I'll solve this one since it is actually quite time-consuming, but I'll give you the best method to solve it:

Since 1/2 is a root, we can factor out (x - 1/2) and obtain

{{{(x - 1/2)(ax^2 + bx + c) = 0}}} where a,b,c are constants. To solve for a, b, c you'll have to use either long division or synthetic division, whichever you prefer.

After finding a,b,c you'll obtain a quadratic {{{ax^2 + bx + c = 0}}} which can then be solved using the quadratic formula (or by factoring if the problem works nicely).