Answer:
Correct choice: C.

Explanation:
The quadratic equation to solve is:

Since this equation is incomplete, we can solve it without using the quadratic solver formula.
Subtracting 10:

Taking square root:

Recall the square root of a negative number leads to imaginary solutions where the Unit Imaginary Number (i) is used, where:

The solutions to the equation are:

Correct choice: C.
