User Manual

E-24
c (x2=) 0.25
!=(Re⇔Im) (x2=) −0.75i
• If a result is a complex number, the real part of the first solution
appears first. Press !=(Re⇔Im) to toggle the display between
the real part and imaginary part of a solution.
x
3
– 2 x
2
– x + 2 = 0
NNN1(EQN) e3
1 =- 2 =- 1 = 2 =
(x1=) 2
c (x2=) –1
c (x3=) 1
Matrix Calculations (MAT)
(fx-570MS/991MS only)
Use the MAT Mode to perform calculations involving matrices of up to
3 rows by 3 columns. To perform a matrix calculation, you first assign
data to special matrix variables (MatA, MatB, MatC), and then use the
variables in the calculation as shown in the example below.
Note: Matrix calculations can use up to two levels of the matrix stack.
Squaring a matrix, cubing a matrix, or inverting a matrix uses one
stack level.
To assign
2 1
1 1
to MatA and
2 –1
–1 2
to MatB, and then
perform the following calculations:
×
2 1
1 1
2 –1
–1 2
(MatA×
MatB),
+
2 1
1 1
2 –1
–1 2
(MatA+MatB)
1. Press NNN2(MAT) to enter the MAT Mode.
2. Press 14(MAT) 1(Dim) 1(A).
M at A
(
m ×n
)
m ?
0.
3. Input the dimensions of MatA: 2 = 2 =.
• This will display the Matrix Editor for input
of the elements of the 2 × 2 matrix you
specified for MatA.
M at A
11
0.
Shows the row number
and column number of the
element. (Example: MatA
23
indicates row 2, column 3
of MatA.)
4. Input the elements of MatA: 2 = 1 = 1 = 1 =.
5. Perform the following key operation: 14(MAT) 1(Dim) 2(B)
2 = 2 =.
• This will display the Matrix Editor for input of the elements of the
2 × 2 matrix you specified for MatB.
6. Input the elements of MatB: 2 =- 1 =- 1 = 2 =.
11