SOLUTION: x2-2x-2=0

Question 281453: x2-2x-2=0
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
x2-2x-2=0
x^2-2x=2
complete the square
1/2*2=1
1^2=1
add one to both sides
x^2-2x+1=3
(x-1)^2=3
x-1=+sqrt(3)
x=1+sqrt(3)

x-1=-sqrt(3)
x=1-sqrt(3)
answer
x=1+sqrt(3), 1-sqrt(3)

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=12 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 2.73205080756888, -0.732050807568877. Here's your graph:

RELATED QUESTIONS
x2-2x+3=0 (answered by jim_thompson5910)

... (answered by user_dude2008)

x2-2x-13=0 (answered by jim_thompson5910)

x2+2x-35=0 (answered by nyc_function)

x2 2x... (answered by alexlove054@gmail.com)

x2-2x-35=0 (answered by MathLover1)

(x2 +2x... (answered by funmath)

Y=x2-2x+2 (answered by ikleyn)

solve for x:... (answered by basketball1127)