[ 7S ] 



therefore it is to be proved that — — /3 J is affirmative, and confe- 

 quently the fquare root poffible. 



y ^» 



— =:m^ — 2bm^ +mn + b^m — A^bn = 



m^ —^bm'-\-2n. m^—iibn.m' +iSb^ n. m'—Sbn*. m-\-i6b'n' 

 +6/J' - 4.b' + n^ —8b*n 



+ b* 



I2S= mi—2bm^+b^m^—2bmn + znm*—'^b''n+n^xm'-—2bm—^n+b''= 



- m^ — ^bm'+6b\m^—^bKm^ — 5«^ m'^ + ^bn^. m + iob^n 

 — n + b* . +4^^ « — 3« 



- 3^'« 



2 

 t 



y; 



— /33= ^^n.m* —izbn. m^ + iS b^ n. m- — 12 b n'^. m + 6 b'^ n^ 



4 



+ 6«* —i2b'» +372' 



+ 3^*« 

 K 2 but 



