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# Title: [Johannis Wallis S. T. D. Geometriae Professoris Saviliani, in Celeberrima Academia Oxoniensi, De Algebra Tractatus; Historicus & Practicus. Anno 1685 Anglice editus; Nunc Auctus Latine. Cum variis Appendicibus; Partim prius editis Anglice, Partim nunc primum editis] Johannis Wallis S. T. D. Geometriæ Professoris Saviliani, in Celeberrima Academia Oxoniensi, De Algebra Tractatus; Historicus & Practicus. Anno 1685 Anglice editus; Nunc Auctus Latine. Cum variis Appendicibus; Partim prius editis Anglice, Partim nunc primum editis (shelfmarks Leibn. Marg. 100:1/2, Stück 2; Leibn. Marg. 100:1/2)
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A L. G F B R A. C aP. 2 111.
Sect. 4. Pr. 17.
AUFHanC aa B - 36ba = 2066. Radix, a = 2.B.
EX. Sccunca Biguadraticarum ( quam viceas tuo loco;)
a aaa =- baa a + bc a a - bc 44 = = B5df.
Caaa F ba aa = bcFa
auda +cad a + bdFa
faca- bfa a = cdfa
CFaa
et 1b1b
Potito B F c. = a = f; ad hanc reducitur.
aa. d bb44 + bb6. d = = bbc d Raclices; F b, + 6, F an c (b10- 13
cCaa  bBda = bcc d
ddaa = bcca = bcd d
BCaa  ccda
b aaabcclb
+2bc d a
-b - c - d.
Sect. 4. Dr. 25.
b d a a = b d d a
bc +ba +ca
b +c + a
X. Fadem; polico f b0 = b d + cd = + bf + 0f  df; adeoque
=f: ad hanc reducitur:
Radices, = B, 10, F an 
bd-
aaaa - bbaaa F BBCCa = F BBCCd.
adaatccdda = bcCdd
oenaa +bcd d a
Ccaaa = bb dda = bbCdd
b +c +d
(D1d- 1)
bdaaat bccda b +c + d decti +. Pr. 26.
b. + c- + d
Cdaaa + bbcda
Proceltis ratio, haec est. Cum Aquatio exposica, LI,
aa a a = ba a a = bc a a = bc d a = F DC a5.
Caaa - baaa- 66) a
daaa + cda a = bdf a
saaa baaFCd) a
CFaa
eu
Polito bc F Ba. = cd = Bf. F cf. F a5, unde cerminus certius destruitur; haec ma-
net;
aa aa = ba a a - bc d a = = bc 4).
=C a a a  bCFa
aaaa = b dfa
Faaa + cdFa
Tum,
dil