The quadratic formula is:
What are a, b, and c? Well, you should know that:
Just check and make sure you typed out the equation correctly. I think you have a missing minus sign somewhere. The way you gave us the equation implied that there was no real solution. If this equation you gave us is correct, then none of these choices are correct.
--Chris
Answer is d.
I need to build an extra piece on the lesson here:
Quadratic Equation
But you can follow the math 1/2 way down and see that you get to:
-2 ± /4
Then Factor out a 2 from the top, which, for the second term is the simplifying the square root.