I need to know how to solve this quadratic equation. I am supposed to answer it by completing the square.

x^2-2x-2=0

I need to know how to solve this quadratic equation. I am supposed to answer it by completing the square.

x^2-2x-2=0

Tutors, please sign in to answer this question.

When completing you must isolate the terms that have x.

x^{2} - 2x = 2

Then you take the coefficient of the "b" term (2x), divide it by 2 and then square it giving you the result of 1. You then add that to both sides so your equation should now read

x^{2} - 2x + 1 = 3

Now simply factor and solve!

(x-1)(x-1) = 3

x - 1 = sqrt(3)

x= sqrt(3) + 1

Christopher B.

Expert Science Tutor for Chemistry, Biology, Physics, Orgo, & more

New York, NY

5.0
(304 ratings)

Neemisha M.

Certified Math Teacher Specializing in Math Success

New York, NY

4.9
(387 ratings)

John Z.

Chemistry, Physics, SAT Math, and Calculus Tutor; CU Chemical Engineer

Brooklyn, NY

5.0
(306 ratings)