Subtraction of Two Matrices

We will learn how to find the subtraction of two matrices.

If A and B two matrices of the same order then A – B is a matrix which is the addition of A and –B.

For Example:

Let A = \(\begin{bmatrix} 0 & 1\\ 4 & 5\\ 3 & 7 \end{bmatrix}\) and B = \(\begin{bmatrix} 2 & -6\\ 8 & 4\\ 5 & -2 \end{bmatrix}\)

Then, A – B = A + (-B) = \(\begin{bmatrix} 0 & 1\\ 4 & 5\\ 3 & 7 \end{bmatrix}\) + \(\begin{bmatrix} -2 & 6\\ -8 & -4\\ -5 & 2 \end{bmatrix}\)

= \(\begin{bmatrix} 0 - 2 & 1 + 6\\ 4 - 8 & 5 - 4\\ 3 - 5 & 7 + 2 \end{bmatrix}\)

= \(\begin{bmatrix} - 2 & 7\\ -4 & 1\\ -2  & 9 \end{bmatrix}\)

Subtraction of Two Matrices

Note: The elements of A – B can also be obtained by subtracting the elements of B from the corresponding elements of A.

For Example:

Let A = \(\begin{bmatrix} 15 & -8\\ 6 & 1 \end{bmatrix}\) and B = \(\begin{bmatrix} 1 & 4\\ -1 & 3 \end{bmatrix}\)

Now subtracting the elements of B from the corresponding elements of A we get,

A – B = \(\begin{bmatrix} 15 & -8\\ 6 & 1 \end{bmatrix}\) - \(\begin{bmatrix} 1 & 4\\ -1 & 3 \end{bmatrix}\)

         = \(\begin{bmatrix} 15 - 1 & -8 - 4\\ 6 + 1 & 1 - 3 \end{bmatrix}\)

         = \(\begin{bmatrix} 14 & -12\\ 7 & -2 \end{bmatrix}\).

 

Solved Examples on Subtraction of Two Matrices:

1. If M = \(\begin{bmatrix} 2 & 5\\ -1 & 3 \end{bmatrix}\) and B = \(\begin{bmatrix} 1 & 1\\ 4 & -2 \end{bmatrix}\), find M – N.

Solution:

M – N = \(\begin{bmatrix} 2 & 5\\ -1 & 3 \end{bmatrix}\) - \(\begin{bmatrix} 1 & 1\\ 4 & -2 \end{bmatrix}\)

         = \(\begin{bmatrix} 2 & 5\\ -1 & 3 \end{bmatrix}\) + \(\begin{bmatrix} -1 & -1\\ -4 & 2 \end{bmatrix}\)

         = \(\begin{bmatrix} 2 - 1 & 5 - 1\\ -1 - 4 & 3 + 2\end{bmatrix}\)

         = \(\begin{bmatrix} 1 & 4\\ -5 & 5\end{bmatrix}\).

Matrix Subtraction

2. If X = \(\begin{bmatrix} 16 & -5\\ 4 & 1 \end{bmatrix}\) and Z = \(\begin{bmatrix} -13 & 4\\ 2 & 0 \end{bmatrix}\), find X – Z.

Solution:

X – Z = \(\begin{bmatrix} 16 & -5\\ 4 & 1 \end{bmatrix}\) -  \(\begin{bmatrix} -13 & 4\\ 2 & 0 \end{bmatrix}\)

         = \(\begin{bmatrix} 16 & -5\\ 4 & 1 \end{bmatrix}\) + \(\begin{bmatrix} 13 & -4\\ -2 & 0\end{bmatrix}\)

         = \(\begin{bmatrix} 16 + 13 & -5 - 4\\ 4 - 2 & 1 - 0\end{bmatrix}\)

         = \(\begin{bmatrix} 29 & -9\\ 2 & 1\end{bmatrix}\).






10th Grade Math

From Subtraction of Two Matrices to HOME


New! Comments

Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.



Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.



Share this page: What’s this?

Recent Articles

  1. 4th Grade Mental Math on Roman Numerals | Roman Numerals Quiz

    Feb 23, 24 03:55 PM

    In 4th grade mental math on numbers, students can practice different questions on write the Hindu-Arabic numerals, write the Roman Numerals, comparison of roman numerals, addition of roman numerals.

    Read More

  2. 4th Grade Mental Math on Numbers | Mental Math 4th Grade with Answers

    Feb 23, 24 02:24 PM

    4th Grade Mental Math on Numbers
    In 4th grade mental math on numbers, students can practice different questions on numbers in figures, number name, place value, face value, comparison of number and formation of greatest and smallest…

    Read More

  3. Roman Numerals | System of Numbers | Symbol of Roman Numerals |Numbers

    Feb 23, 24 01:28 PM

    List of Roman Numerals Chart
    How to read and write roman numerals? Hundreds of year ago, the Romans had a system of numbers which had only seven symbols. Each symbol had a different value and there was no symbol for 0. The symbol…

    Read More

  4. Worksheet on Roman Numerals |Roman Numerals|Symbols for Roman Numerals

    Feb 22, 24 04:15 PM

    Roman Numbers Table
    Practice the worksheet on roman numerals or numbers. This sheet will encourage the students to practice about the symbols for roman numerals and their values. Write the number for the following: (a) V…

    Read More

  5. Roman Symbols | What are Roman Numbers? | Roman Numeration System

    Feb 22, 24 02:30 PM

    Roman Numbers
    Do we know from where Roman symbols came? In Rome, people wanted to use their own symbols to express various numbers. These symbols, used by Romans, are known as Roman symbols, Romans used only seven…

    Read More