Question

Solve by completing the square. x2- 2x - 4 = 0

Select one:
a. -12
b.
15

c. -15
d. 12

Answer 1

first rearrange:
x^2 - 2x = 4
(x - 1)^2 -1 = 4
(x-1)^2 = 5

can you continue

do you understand how I got the second line?

Answer 2

i Got Square root 5+1

Answer 3

thats correct - well sqrt5 +1 , -sqrt5 + 1

the options are incorrect