In this lesson, we will learn how to add and subtract matrices. We can only add or subtract matrices if their dimensions are the same. To add matrices, we simply add the corresponding matrix elements together. To subtract matrices, we simply subtract the corresponding matrix elements together. Not only can we add and subtract matrices, but we can solve matrix equations as well. For example, we can add or subtract both sides of the matrix equations to find out what the variable is.
We can add and subtract matrices only if the dimensio
ns of the matrices are the same. For example,
We want to find out what A+B is. We see that we are allowed to add A and B together because both A and B has a dimension of 2 x 3.
To add the two matrices together, we simply just need to add the corresponding matrix elements of A and B. So,
Same idea goes for subtracting. We can subtract them because the dimensions are the same. If we want to find out what A - B is, then
Understanding how to add and subtract matrices
Can we add or subtract the following matrices?
Add the following matrices:
Subtract the following matrices
Solving matrix equations
Solve the following matrix equations:
Adding and subtracting matrices
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We have 1040 practice questions in Algebra 2 for you to work through.