SOLUTION: Solve using the quadratic equation: X^2-4x-13=0 I have completed the calculation and was fairly confident of my solution, but it is wrong according to the answer key.

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Solve using the quadratic equation: X^2-4x-13=0 I have completed the calculation and was fairly confident of my solution, but it is wrong according to the answer key.      Log On


   

Question 459273: Solve using the quadratic equation:
X^2-4x-13=0
I have completed the calculation and was fairly confident of my solution, but it is wrong according to the answer key.
Answer by Gogonati(855) About Me  (Show Source):
You can put this solution on YOUR website!
To solve this equation we use the quadratic formula:
x=%284%2B-sqrt%284%5E2%2B4%2A1%2A13%29%29%2F2, simplifying the solution we get:
x=2%2Bsqrt%2817%29, and x=2-sqrt%2817%29.