**9 squared**, (9)

^{2}, is the number you get when multiplying 9 times 9.

It can also be looked at as exponentiation involving the base 9 and the exponent 2.

The term is usually pronounced nine times nine or nine squared.

The square of 9 is a perfect square because the number is the product of the two equal integers 9.

It can be written as 9 × 9 or in exponential form.

Read on to learn everything about the number nine squared, including useful identities.

±

Reset

**(9)**

9 × 9 = 81

^{2}= 819 × 9 = 81

The inverse operation of squaring nine is extracting the square root of 9, explained here.

In the next section we elaborate on

*what is 9 squared*and there you can also find our calculator.

## What is 9 Squared?

A square is a flat shape with four equal sides; every angle is 90°.Hence, a square with side length 9 has an area of 81.

9 squared equals the sum of the first 9 odd numbers:

In addition, the number can be calculated from 8 squared using the following identity:

n

^{2}= (n − 1)

^{2}+ (n − 1) + n = (n − 1)

^{2}+ (2n − 1)

(9)

^{2}= 8

^{2}+ 8 + 9 = 8

^{2}+ 17 = 81

It can be also be computed from 8 squared with this identity:

n

^{2}= 2 x (n − 1)

^{2}− (n − 2)

^{2}+ 2

(9)

^{2}= 2 x 8

^{2}– 7

^{2}+ 2 = 2 x 64 – 49 + 2 = 81

The difference between the perfect square of 9 and its predecessor, 8, can be calculated with the identity n

^{2}− (n − 1)

^{2}= 2n − 1:

2 x 9 – 1 = 17 = (9)

^{2}– 8

^{2}= 81 – 64 = 17

9 is odd, and the square numbers of odd numbers are also odd: (2n + 1)

^{2}= 4 × (n

^{2}+ n) + 1.

Squares of odd numbers like 9 are of the form 8n + 1, because (2n + 1)

^{2}= 4n × (n + 1) + 1;

n × (n + 1) is an even number.

If you want to calculate the square of any number, not only integers like 9, you can use our calculator above.

Enter your number; nothing else to be done.

A square similar to 9 is, for example: square of 11.

Ahead, we discuss the frequently asked questions.

## FAQs About 9 Squared

Click on the question which is of interest to you to see the collapsible content answer.### What is the Square of 9?

The square of 9 is 81.

### How do you Write 9 Squared?

9 squared can be written as (9)

^{2}(a small 2 is placed to the top right of 9) or 9^2.### Is There a Square Root of 9?

Yes, the square roots of 9 are ±3.

### What is the Perfect Square of 9?

The perfect square of 9 is 9 × 9 = 81.

### How Do You Square 9?

You square 9 by multiplying 9 by itself.

### Is 9 a Square Number?

Yes, 9 is the perfect square of 3.

### What is the Square of Negative 9?

The square of negative 9 is 81.

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The following table contains the squares of numbers close to 9.

## Table

Number | Square |
---|---|

4 | 16 |

5 | 25 |

6 | 36 |

7 | 49 |

8 | 64 |

9 | 81 |

10 | 100 |

11 | 121 |

12 | 144 |

13 | 169 |

14 | 196 |

## Nine Squared

By reading so far you know all about squaring the number 9 and calculating it using recursive methods, or as sum, product or by exponentiation.9 squared is equivalent to 81.

If you were searching for

*what is 9 squared in math*or if you typed whats 9 squared in the search engine you now have all the answers, too.

The same goes for searches like square9, and 9 to the 2nd power, just to name a few more examples people are often looking for.

Note that you can also find many perfect squares including 9 squared using the search form in the sidebar of this page.

Ahead is the summary of our information.

## Conclusion

To sum up,9 squared = 9 × 9 = (9)

^{2}= 81.

The exponentiation form is mostly used to denote nine squared.

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