MATLAB1

An Introduction MATLAB

Getting Started: Some Arithmetic

The Golden Ratio

http://en.wikipedia.org/wiki/Golden_ratio

phi = (1 + sqrt(5))/2

phi =
    1.6180

format long
phi

phi =
    1.618033988749895

φ2 − φ − 1 = 0

p = [1 -1 -1]
r = roots(p)

r =
  -0.618033988749895
   1.618033988749895