Main content

### Course: Algebra basics > Unit 1

Lesson 3: Exponents- Intro to exponents
- Exponent example 1
- Exponent example 2
- Squaring numbers
- Intro to exponents
- The 0 & 1st power
- Powers of zero
- Meaning of exponents
- 1 and -1 to different powers
- Comparing exponent expressions
- Exponents of decimals
- Powers of whole numbers
- Evaluating exponent expressions with variables
- Variable expressions with exponents
- Exponents review

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# Squaring numbers

## Introduction

In this article, you'll learn how to square numbers!

## Example

Here's how we square the number $3$ :

### Reflection question

## Practice

## Challenge problem

## Want to join the conversation?

- khan academy is a great site! ive learned a lot(49 votes)
- Yes, Yes It Is.(9 votes)

- Why is it that when you do exponents of zero it is always 0(27 votes)
- But do not be confused with anything to the power of 0 because that is 1(17 votes)

- In one of the tutorials the answer stated -1 to the 0 power is +1. I don't understand why. If you have a -1 and you times it by itself 0 times, wouldn't that leave you with -1?(11 votes)
- So this is a trick of conventional logic vs mathematical rules. Don't confuse the absolute value of the event with whether or not the event happened. I'll explain.

-1 times itself 0 times means that -1 was in fact multiplied by itself, the event happened, but to an exponent with an absolute value of 0. Therefore the absolute value of -1 is not affected, it remains 1, but the event still happened, so the signs also have to be multiplied, and a -x- is a +, hence the absolute value remains unchanged but the sign changes.

I hope this makes sense, it is a difficult concept to explain.(15 votes)

- easy peasy lemon squezy!.....(14 votes)
- 0% chances to fail but 99.9% chance to score good in these questions!(5 votes)

- This is so easy!(7 votes)
- How can I grasp the concept of linear equations?(6 votes)
- can you explian more plz(5 votes)
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yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy(4 votes)- that's why it's called practice(0 votes)

- There’s no sign for multiplication(3 votes)
- There doesn't need to be. If it is asking you to solve 1 to the 2nd power, you won't type 1x1, you'll type 1, because 1x1 is equal to 1. If it is asking you what 2 to the 2nd power is, type 4, not 2x2.(2 votes)

- Khan Academy makes everything easier to learn especially math.(3 votes)