ex QJ'AXTn.ninrs irrationji.ws 3$ 



qutc fi habet radicem rationalcm crit ea vcl -!- ', \el 

 -j- *~ : reperitur autem rudix a — - ; , vnde radix 



qu;icfit:i habetur r- 71 — ~ 



Neque circ:i hanc radicem vllum dubium manerepotcft, 

 praeter figna radicalium vtrum ea debcant affiimatiue ca- 

 pi an negatiue ; inquirenti autem pattbit figna haec in- 

 veuta refte ic habere 



§. 24.. Hacc radicnm extnuftio , (\ binomium pro- 

 pofitum fuerit imaginarium , ablblui ctiam potcft ope 

 multi (e&ionis angulprum, quippe quae in locum aequa- 

 tionis illius refoluendae fiibftitui potcft. Efficietur hoc 

 autcm ope icquentmm lcmmatum : 



I. Si fucrit u i— cof. l n A fin. a erit 



II. Si fiicrit v — fin. £ A fin. a crit 



V (V(i-aa)-i-aV-i )- V(V(i-aa)-aV-i) 



v _ 2 ^_1 



Ponatur iam aV— 1 _- ^^ , fiet y(i— aa)=i Jx-SJ 



Hincquc fureriora lcrrmata lcqucnto pracbebunt acquationes 



: , K r — ~ AB - V(A+B)^v(A-B)" 



I.cof;Afin (AA-BB)V-i —— n — — 



2 v (AA-EB) 



11. fin lAfiii. — — - ' — 



(AA-i^)V-i a y_,.t ( AA-BB) 



E 2 Qiiod 



