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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)
# Folio 163, page id 851708439:0187
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se
adeo
d.
Bet
da
+)
XVI. Factem; polito b0 F af = b d Fca F 6f Fcf; adeoque b6- b a G4
=25 +cf - as; et
bd cd
c - d
=5; ad hanc reducitur;
Cap. XXXIX. A E C E B R A.
aaaa = BBaaa = BBCCa = = BBCCd
b
 bbaa
LBCad
F66dd
bbcd
c
=bccd
d
= bbcad
= BcCd d
Radices; F B, = c,
d
Db Da-6a
c- d  7
Scct. 4. PI. 32.
XVII. Tadem; volico as-cs - Vs - bc - b d -cd; adeo que Bc bd cd
ad nave reducicur;
aaaa = BBaaa = BBCCa = = BBCd4
-b0
L66
Bbad = bccdd
obul
1-c - b
esO
is
d
cc dd
ODca
Racicco; = B, = C, = d, 8
=d6 F 6a -=c d
06bd
ei
6
et
oecl. 4. Pr. 33.
XVIIT. Eadem; polico bc d+BCF -bdFcas; adeoque bed -bas t cas -Bes.
bcd
B d F Ca - Be =s; ad hanc reducitur,
aaa a = bBCa a4 - bbCC4a = - bbCCd d.
1- BCC
FBad
Cdd
-Bba
-ccd
-2bc d
=-bbdd
=Bcad
=cc dd
= BBCa
= bccd
Bd =ca - bc
Radiced; = 6, 467 = an 
bcd
XIX. Fadem; potitis cum B + 0 = a F f; cum BB = Bc + 5c = a5; ad hanc
reducitur,
aaa - bbb a = - bbbc
Radices; = b, + 6, e
= bbc - bbc6
-b66 bCC6
6c0
b c+ Y:  36b- 2b6- 36c:
Sect. 4. Pr. 35.
Imaginarix radices (aa. =. B a = - Bb
- b- c- Y. 360- 2bc- 300: 1
hujus aequationis, vic.  +6a = bc
66
XX. Fadtem; posicis cum Bc + df = bd = cd F bf + cs; tum a. + 5. -
bb6 = BcC
Bb. = bc +65 reducitur ad hanc;
AAAa
bd + cd - b
Sect. 4. Pr. 34.