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D-26
Voorbeeld 2: Om de vergelijking 8
x
2
– 4x + 5 = 0
op te lossen
(
x =
0,25
±
0,75
i
)
(Degree?) 2
(a?) 8
=
(b?) D 4 =
(c?) 5 =
(x1 = 0.25 + 0.75i) ]
(x2 = 0.25 – 0.75i)
k Simultane vergelijkingen
Simultane lineaire vergelijkingen met twee onbekenden:
a1x + b1y = c1
a2x + b2y = c2
Simultane lineaire vergelijkingen met drie onbekenden:
a1x + b1y + c1z = d1
a2x + b2y + c2z = d2
a3x + b3y + c3z = d3
Het aanvankelijke simultane vergelijkingsscherm wordt
verkregen bij inschakelen van de EQN functie.
2
3
Unkno
w
ns?
Specificeer m.b.v. dit scherm 2 of 3 als het aantal
onbekenden in voer een waarde in voor elk van de
coëfficiënten.
0.
a1?
Elementwaarde
Naam van coëfficiënt
De pijl toont de
richting waarin u
dient door te
bladeren om
andere elementen
te kunnen zien.
Op elk moment voordat u een waarde invoert voor de
laatste coëfficiënt (
c2 bij twee onbekenden, d3 bij drie
onbekenden), kunt u m.b.v. de [ en ] toetsen tussen
de coëfficiënten heen en weer bewegen op het scherm
en zonodig veranderen aanbrengen.
28


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