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murkle
on April 30, 2018
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The quadratic formula and low-precision arithmetic
Numerical Recipes says to find q=-1/2[b+sgn(b)sqrt(b^2-4ac)] and then find x1=q/a and x2=c/q - is that better?
http://www.solipsys.co.uk/cgi-bin/sews.py?NumericallyStableS...
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http://www.solipsys.co.uk/cgi-bin/sews.py?NumericallyStableS...