Sharp EL-556G - Simultaneous Linear Equations with Three Unknowns

e Upon changing to another mode, the imaginary
portion of any complex number stored in the
independent memory (M) will be cleared.
e A complex number expressed in rectangular
coordinates with the y-value equal to zero, or
expressed in polar coordinates with the angle
equal to zero, is treated as a real number.
SIMULTANEOUS LINEAR EQUATIONS
WITH THREE UNKNOWNS
(— page 212)
To solve simultaneous linear equations with three
unknowns, press to select the 3-VLE
mode.
Simultaneous Linear Equations with Three Un-
knowns
a2x + bey + coz = de
| ax + by +z =d1
asx + bsy + c3z = ds
In matrix notation, the system of equations becomes
aibic1 | [ x ] dy
a2bece2 y = d2
a3b3C3 Z J d3
aybic, |, , ss ch
If D = aobece | , Its determinant is given by
a3b3C3
a4 b; Ci
a2bece
a3b3C3
IDI =
The value of the determinant D is given by:
D = a1(becs—bsc2) — b1(a2cs—asce2) + c1(a2bs—a3be)
a Oe