x3 – 2x2 – x + 2 = 0

 

 

 

 

N5(EQN)4(aX3 + bX2 + cX + d = 0)

 

 

 

 

1 =-2 =-1 =2 ==

(X1=) –1

c

(X2=)

2

c

(X3=)

1

 

 

 

 

 

 

 

 

 

 

Matrix Calculations (MATRIX)

Use the MATRIX 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.

1

To assign 2

1

to MatA and

2 –1to MatB, and then perform

1

1

 

–1

2

 

 

the following calculations: 2 1 ⋅ 2 –1(MatA×MatB),

1 1 –1 2

2 1 + 2 –1(MatA+MatB)

1 1 –1 2

1.Press N6(MATRIX) to enter the MATRIX Mode.

2.Press 1(MatA)5(2⋅2).

• This will display the Matrix Editor for input

 

 

MAT

of the elements of the 2 ⋅ 2 matrix you

 

 

 

 

 

 

specified for MatA.

 

 

 

 

 

 

 

 

 

 

 

“A” stands for “MatA”.

3.Input the elements of MatA: 2 =1 =1 =1 =.

4.Perform the following key operation: 14(MATRIX)2(Data)

2(MatB)5(2⋅2).

•This will display the Matrix Editor for input of the elements of the 2 ⋅ 2 matrix you specified for MatB.

5.Input the elements of MatB: 2 =-1 =-1 =2 =.

6.Press A to advance to the calculation screen, and perform the first calculation (MatA⋅MatB): 14(MATRIX)3(MatA)*14(MATRIX) 4(MatB)=.

•This will display the MatAns screen with the calculation results.

MAT

 

 

MAT

 

“Ans” stands for

 

→

 

 

 

 

 

 

 

 

 

 

 

“MatAns”.

 

 

 

 

 

 

Note: “MatAns” stands for “Matrix Answer Memory”. See “Matrix Answer Memory” for more information.

7.Perform the next calculation (MatA+MatB): A14(MATRIX)

3(MatA)+14(MATRIX)4(MatB)=.

MAT

MAT

→

E-37