Square root of 7

If you are looking to answer the following questions: “what is the square root of 7?” The answer is 2.6457513110646. 

ANSWER: square root of 7=2.6457513110646

The square root of a number (7 in this case) is a number (2.6457513110646 in this case) which multiplied by itself equals the number from which you are calculating the square root (7). Mathematically square root of 7 can expressed in the radical form or an exponent form as shown below:

  • Radical form of the square root of 7: √7
  • Exponent form of the square root of 7: (7)½ or (7)0.5

This symbol is called radical sign or radix. The number whose square root is being calculated is called the radicand. The radicand is the number underneath the radical sign (radix), in this case it is 7.

Square root calculation explainer video

 

Square root of 7 calculator

If you would like to confirm the answer to the question of “what is the square root of 7?” or calculate a square root of any other number use the square root calculator:

Square Root of:
Answer:

 

Square root of 7 calculation guide

In the following sections we explain how to calculate the square root of 7. We will answer such common questions as: “is the square root of 7 rational or irrational?” and “is 7 a perfect square?” We will discuss what the principal square root of 7 is.  For your reference we also included the following tables:

  • Nth roots of 7
  • Perfect square numbers
  • Square roots of numbers around 7 

You will find all the information you need on the square root of 7 calculations below. 

What is the square root of 7?

The square root of 7 is a number which multiplied by itself equals 7. Therefore, the square root of 7 is 2.6457513110646 and we write it √7=2.6457513110646 because 2.64575131106462=7. Since 2.64575131106462 is the same as 2.6457513110646 x 2.6457513110646 the following expressions is true:

7 = 2.64575131106462=2.6457513110646×2.6457513110646

Therefore

ANSWER: square root of 7=√7=2.6457513110646

Is 7 a Perfect Square?

A number is considered a perfect square if it is a product of squaring a whole number (called integer). 0, 1, 2, 3, 4, 7, 8, and 9 are all whole numbers (same as integers). Numbers such as -8, 7.025, or 5 ½ are not whole numbers. Remember squaring is when a number is multiplied by itself. For example, 81 is a perfect square because it is a product of 92 which is the same as 9×9. Notice 9 is a whole number (integer).

In our example the square root of 7 is 2.6457513110646. Since 2.6457513110646 is not a whole number therefore 7 is not a perfect square.

ANSWER: 7 is not a whole number 

Is the square root of 7 rational or irrational number?

A number is rational when it can be made by dividing a whole number by a whole number. A whole number which is also called an integer does not have a fractional part itself. Simply said a number is rational if it can be written as a fraction. 

A quick method to determine if 7 is a perfect square. The square roots of perfect squares are all rational numbers. The square roots of numbers that are not a perfect square are all irrational numbers. Since we know that 7 is not a perfect square therefore 7 is not a rational number.

Principal square root of 7

Every positive number has two square roots. One of the square roots is positive and another one is negative. For example the square roots of 7 are -2.6457513110646 (negative) and +2.6457513110646 (positive) because  (-2.6457513110646)^2=(+2.6457513110646)^2=7. The positive square root is denoted as “the principal square root”. Typically, when we are calculating “the square root of a number” we mean the principal square root. In our case it is positive 2.6457513110646 or +2.6457513110646 which is written as 2.6457513110646. As you may know if there is no minus (-) sign before a number it is a positive number. 

Again the principal square root of 7 is 2.6457513110646.

Calculating the square root of 7 with a calculator

In order to calculate the square root of 7 with a basic or a scientific calculator you need to enter 7 and then press the key with this sign  “√x”

√7 = 2.6457513110646

Calculating the square root of 7 in Excel and Google Sheets

There are two functions you can use to do this calculation. You can use the function SQRT () to calculate the square root of any number in Excel and Google Sheets. Click on a cell and type =SQRT(7). Hit enter. You will get 2.6457513110646.

You can also use the POWER function which works like an exponent is an equation. To find a square root of 7 type =POWER (7, 1/2). Remember square roots can be expressed as exponents as we discussed earlier in this article.

Table: Nth roots of 7

In the section above we explained how the square root (which is the 2nd root) of 7 is calculated. However there are more roots of 7. Find the Nth roots of 7 in the table below:

 

Index (N)Nth Root of RadicandExpressionRoot
2Square Root of 7²√72.646
3Cube Root of 7³√71.913
4Forth Root of 7⁴√71.627
5Fifth Root of 7⁵√71.476
6Sixth Root of 7⁶√71.383
7Seventh Root of 7⁷√71.320
8Eight Root of 7⁸√71.275
9Nineth Root of 7⁹√71.241
10Tenth Root of 7¹⁰√71.241

Table: Square root of numbers around 7

This table lists numbers around 7 and their respective square roots.

NUMBERSQUARE ROOT
21.414
31.732
42.000
52.236
62.449
72.6457513110646
82.828
93.000
103.162
113.317
123.464

 

Table: Perfect square numbers

This table lists perfect square numbers from 1 through 10,000.

Perfect SquaresSquare RootWhole Number (Integer)
1sqrt 1 =1
4sqrt 4 =2
9sqrt 9 =3
16sqrt 16 =4
25sqrt 25 =5
36sqrt 36 =6
49sqrt 49 =7
64sqrt 64 =8
81sqrt 81 =9
100sqrt 100 =10
121sqrt 121 =11
144sqrt 144 =12
169sqrt 169 =13
196sqrt 196 =14
225sqrt 225 =15
256sqrt 256 =16
289sqrt 289 =17
324sqrt 324 =18
361sqrt 361 =19
400sqrt 400 =20
441sqrt 441 =21
484sqrt 484 =22
529sqrt 529 =23
576sqrt 576 =24
625sqrt 625 =25
676sqrt 676 =26
729sqrt 729 =27
784sqrt 784 =28
841sqrt 841 =29
900sqrt 900 =30
961sqrt 961 =31
1024sqrt 1024 =32
1089sqrt 1089 =33
1156sqrt 1156 =34
1225sqrt 1225 =35
1296sqrt 1296 =36
1369sqrt 1369 =37
1444sqrt 1444 =38
1521sqrt 1521 =39
1600sqrt 1600 =40
1681sqrt 1681 =41
1764sqrt 1764 =42
1849sqrt 1849 =43
1936sqrt 1936 =44
2025sqrt 2025 =45
2116sqrt 2116 =46
2209sqrt 2209 =47
2304sqrt 2304 =48
2401sqrt 2401 =49
2500sqrt 2500 =50
2601sqrt 2601 =51
2704sqrt 2704 =52
2809sqrt 2809 =53
2916sqrt 2916 =54
3025sqrt 3025 =55
3136sqrt 3136 =56
3249sqrt 3249 =57
3364sqrt 3364 =58
3481sqrt 3481 =59
3600sqrt 3600 =60
3721sqrt 3721 =61
3844sqrt 3844 =62
3969sqrt 3969 =63
4096sqrt 4096 =64
4225sqrt 4225 =65
4356sqrt 4356 =66
4489sqrt 4489 =67
4624sqrt 4624 =68
4761sqrt 4761 =69
4900sqrt 4900 =70
5041sqrt 5041 =71
5184sqrt 5184 =72
5329sqrt 5329 =73
5476sqrt 5476 =74
5625sqrt 5625 =75
5776sqrt 5776 =76
5929sqrt 5929 =77
6084sqrt 6084 =78
6241sqrt 6241 =79
6400sqrt 6400 =80
6561sqrt 6561 =81
6724sqrt 6724 =82
6889sqrt 6889 =83
7056sqrt 7056 =84
7225sqrt 7225 =85
7396sqrt 7396 =86
7569sqrt 7569 =87
7744sqrt 7744 =88
7921sqrt 7921 =89
8100sqrt 8100 =90
8281sqrt 8281 =91
8464sqrt 8464 =92
8649sqrt 8649 =93
8836sqrt 8836 =94
9025sqrt 9025 =95
9216sqrt 9216 =96
9409sqrt 9409 =97
9604sqrt 9604 =98
9801sqrt 9801 =99
10000sqrt 10000 =100

Visit squarerootof.net for any square root related calculations including square roots, negative square roots, square roots from fractions, exponentiation and other related calculations.

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