Question

Solve by completing the square and then use the square root method to solve. x2 - 4x - 32 = 0

Answer 1

x=-4
x=8

Answer 2

http://www.youtube.com/watch?v=xGOQYTo9AKY

x^2-4x-32 = 0
(x^2-4x+4) -32 -4 = 0
(x-2)(x-2) -36 = 0

(x-2)^2 = 36
sqrt((x-2)^2) = sqrt(36)

x-2 = +/-6
Where x-2 = +6
x = 8

Where x-2 = -6
x=-4