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Algebra

Notation of matrices- Home
- ACT Compass Test Prep
- Introduction to Matrices

Still Confused?

Try reviewing these fundamentals first.

Algebra

Notation of matricesStill Confused?

Try reviewing these fundamentals first.

Algebra

Notation of matricesNope, I got it.

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- Lesson: 2a2:14
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In this section, we will learn about scalars, and how we use them to multiplying a matrix. A scalar is a real number that can be multiplied to a matrix. To do this, we take the scalar and multiply it to each entry in the matrix. We will look at a few questions which scalar multiplication, and then we will look at matrix equations with repeated addition and subtraction. These matrix equations can be simplified with a scalar. Lastly, we will learn how to solve matrix equations with variables which deals with scalar multiplication.

Basic concepts: Notation of matrices,

Scalar is a real number which we can multiply to a matrix. For example, let

We want to find what 2*A* is. Then what we do is:

We want to find what 2

- 1.Multiplying a matrix by a scalar overview
- 2.
**Scalar multiplication**

You are given the following matrix

Find:a)2*A*b)-4*A*c)6*A*- 2*A* - 3.
**Repeated addition and subtraction**

Solve the following without having to add or subtract repeatedly:a)b) - 4.
**Scalar Multiplication with Matrix equations**

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

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