f(a,b)*f(c,d)=(ac-bd+ad+bc+4bd)^2 + 2(ac-bd)(ad+bc+4cd)

来源: 于 2012-03-14 11:16:15 [旧帖] [给我悄悄话] 本文已被阅读：次

=(F+G)^2 + 2(F + G) So, belong to A.

Sorry,I should do Q with pen later.