phi

screenshot_1-28-2016_1

\phi phi

with a fine X increment of .01, autocad can graph the equation

Y=X^2-X-1

and find the values for x where y is 0 accurate to approximately 5 decimal places.

screenshot_1-30-2016_4

screenshot_1-30-2016_2

screenshot_1-30-2016_3

screenshot_1-31-2016_5

credit to http://www.2dcurves.com/spiral/spirallo.html
for the golden spiral formula

screenshot_1-31-2016_3

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