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Algebra

Notation of matrices- Home
- ACCUPLACER Test Prep
- Introduction to Matrices

Still Confused?

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Algebra

Notation of matricesStill Confused?

Try reviewing these fundamentals first.

Algebra

Notation of matricesNope, I got it.

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Get Started Now- Intro Lesson5:10
- Lesson: 1a1:28
- Lesson: 1b1:57
- Lesson: 1c0:55
- Lesson: 2a2:34
- Lesson: 2b1:53
- Lesson: 2c4:03
- Lesson: 3a2:26
- Lesson: 3b3:07
- Lesson: 3c3:36
- Lesson: 4a3:32
- Lesson: 4b4:04
- Lesson: 4c5:08

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.

Basic concepts: Notation of matrices,

We can add and subtract matrices only if the dimensions of the matrices are the same. For example,

Let

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

Let

We want to find out what

To add the two matrices together, we simply just need to add the corresponding matrix elements of

Same idea goes for subtracting. We can subtract them because the dimensions are the same. If we want to find out what

- IntroductionAdding and subtracting matrices overview
- 1.
**Understanding how to add and subtract matrices**

Can we add or subtract the following matrices?a)b)c) - 2.
**Adding matrices**

Add the following matrices:a)b)c) - 3.
**Subtracting matrices**

Subtract the following matricesa)b)c) - 4.
**Solving matrix equations**

Solve the following matrix equations:a)b)c)

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