... married,and now she is remembered only through the book that bears her name.Preface to the Second Edition This edition has been completely retyped in LATEX, and many of the figuresredone using the ... Thesefill some gaps in the first edition and give more insight into laterdevelopments.• There are many more exercises. This, I hope, corrects a weakness ofthe first edition, which had too few exercises, ... quadraticequation).The last, and hardest, case is finding the intersection of two circles. Fortu-nately, it is easy to reduce these two quadratic equations to the case just handledin Exercise 6.3.4.6.3.5...