Question

Solve. show all work
u2 − 2u − 2 = 0

Answer 1

Solve using completing the square
move 2 to other side
u^2 -2u = 2
take half of middle coefficient and square it, add to both sides
u^2 -2u +1 = 2+1
Factor left side
(u-1)^2 = 3
Square root of both sides
u-1 = +-sqrt(3)
u = 1 +- sqrt(3)

Answer 2

you could also use quadratic formula :)

Answer 3

o ok thank you for telling me