20 -4 -10 30-4 18 -11 -18

-10 -11 30 20

det(I1) 30 -4 -10-18 18 -1120 -11 30

det(I2) 20 30 -10-4 -18 -11

-10 20 30

det(I3) 20 -4 30-4 18 -18

-10 -11 20

Method 1

1 Find determinant for original matrix formula==> mdeterm(matrix)2 Find determinant for Matrix I13 Find determinant for Matrix I24 Find determinant for Matrix I35 Find I1, I2 and I3 formula==> divide determinant I1, I2 and I3 with determinant of original matrix6 The asnwer wil be appeared separately

Method 2

1 Find inverse matrix formula==>select 3x3 boxes and key-in the formula minverse(array). After selecting the array, hold down control and shift keypad, then enter2 Multiply inverse matrix with the 3x1 matrix given formula==>select 3x1 boxes and key-in the formula mmult(matrix 3x3, matrix 3x1), hold down control and shift key pad, then enter3 The answer will be appeared silmutaneously

det(I) 5220det(I1) 12910det(I2) 3100det(I13) 8920I1 2.473 2.473I2 0.594 0.594I3 1.709 1.709

formula==> mdeterm(matrix)

formula==> divide determinant I1, I2 and I3 with determinant of original matrix

formula==>select 3x3 boxes and key-in the formula minverse(array). After selecting the array, hold down control and shift keypad, then enterformula==>select 3x1 boxes and key-in the formula mmult(matrix 3x3, matrix 3x1), hold down control and shift key pad, then enter

formula==>select 3x3 boxes and key-in the formula minverse(array). After selecting the array, hold down control and shift keypad, then enterformula==>select 3x1 boxes and key-in the formula mmult(matrix 3x3, matrix 3x1), hold down control and shift key pad, then enter