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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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2
XII. Biquadratiearum Terciam
aaaa = baaa = bc a a = bc d a = = b5a5.
Fcaaa: = bda a -- bcf a
Ydaaa = cd a a = b dFa
Faaa -- bfa a - cdF a
essaa
aa 2 a - bb a a - bbCa = = bbc d
bbd
CCa
dd
cd. d
26c d
AE CF B R A. CaP. XXXIX.
POLito B F c F a = = f; ad hanc reducitur,
LBCCa
Radices, - 3, -c,
b0c + b0dd.
dus e
b+ c + d = +s.
ielb. 4. PL. 26.
XIII. L. adtem squaio; Polico Bc. + B a + cd = v f. + cf. + as; adleoque
6c. + ba + 5d
b =c. = dSi ad hanc reducitur;
aa aa = BBaaa = BbCCa = = Bbc0d Radices; = B, - c, - d, e
66.
=bba4 = bbCa a bc + bd F cd
+dd - ccdd + bccdd. B +. c + d
=bc
+bd
= bcdd
= bccd
FCd - bbc d
3+ c + d
Scct. 4. pr. 29.
Bcd
XIV. Eadem Aquatio; Bosico BC d = b5F + B a f. + 5 ds, adteoqe vc + bd.  cd
=f; ad hanc reducitur:
aa aa + Bbcaaa = bBcCa4 = = BbCCdd.
+ bBd = bbad
+bcC = ccdd
Lccd
 et et
+ bcdd
66be
obei
=cad
 2bca
db1da F6d
Radices, - B, - c, - d, 8
L bCd
Be + bd FCa
Sect. 4. Pr. 30.
aaaa = baaa F Bcaa = bc d a = = bc af.
Caaa bdaa  BCFa
daaa- cdaa- bdfa
Faa a bfaa- cd5a
cfaa
dfaa
Polico b. +c = a + 5; adeoque B + c - a = s; ad hianc redueitur;
aaaa + bd aa. = BBCa = = BBCd
Lcd
LBcc
= bcCd
Fcdd
=b0
c0
da
bda
e
=bbd
b b a
et
+bCaa
Racices; F b, f c,- d e
-c  a
Sect. 4. Pr. 31.
lo ilar.