User Manual

Chapter 10: Matrices 151
Using Math Functions with Matrices
Using Math Functions with Matrices
You can use many of the math functions on the TI-84 Plus keypad, the
MATH menu, the MATH NUM
menu, and the
MATH TEST menu with matrices. However, the dimensions must be appropriate.
Each of the functions below creates a new matrix; the original matrix remains the same.
Addition, Subtraction, Multiplication
To add or subtract matrices, the dimensions must be the same. The answer is a matrix in which
the elements are the sum or difference of the individual corresponding elements.
matrixA+matrixB
matrixANmatrixB
To multiply two matrices together, the column dimension of matrixA must match the row dimension
of
matrixB.
matrixA…matrixB
Multiplying a matrix by a value or a value by a matrix returns a matrix in which each element of matrix
is multiplied by
value.
matrix…value
value…matrix