-13 > (* 2+3i 3+2i) +13i 2-2: 2-3: 2-4: 2-5: 2-6: for for 2-7: since the above is now in the usual form of the quadratic formula it is clear z is a solution. Filed under: lisp , math , physics , qmismf No Comments 27 Aug/09 0 Exercise 2.42 of SICP