Question

Complete the square and use quadratic formula:
x^2 - 2x - 1 = 0

I got to:
x^2 - 2x = 1
(x + 2)^2 = +/-√2

Answer 1

x^2 - 2x - 1 + 2 = 2
(x-1)^2 = 2

Answer 2

Darn.
(x+2)^2 = 2
x + 2 = +/-√2

Answer 3

why would they want to complete the square? it's not helping..

Answer 4

x-1 = +-sqrt(2)
x = -sqrt(2) + 1
x = sqrt(2)+1

Answer 5

well actually it was helping

Answer 6

That's by completing the square

Answer 7

x^2 - 2x - 1 = 0
D = (-2)^2 - 4*1*(-1)=4+4 = 8

Answer 8

x1 = (2 - sqrt(8))/2 = 1 - sqrt(2)
x2 = (2 + sqrt(8))/2 = 1 + sqrt(2)

Answer 9

come on now, make me level 59!

Answer 10

yay lol!

Answer 11

Thank you. :D

Answer 12

tnx

Answer 13

and np