84 is the amount of pair primes (41 + 43). That is an also composite number that has 2, 3, and also 7 as its prime factors. In this mini lesson, let us learn about the square source of 84, discover out even if it is the square source of 84 is reasonable or irrational, and see how to find the square source of 84 by long division method.

**Square source of 84**:

**√84**= 9.165

**Square the 84: 84**2 = 7056

1. You are watching: Square root of 84 in radical form | What Is the Square source of 84? |

2. | Is Square root of 84 reasonable or Irrational? |

3. | How to discover the Square root of 84? |

4. | FAQs ~ above Square source of 84 |

Finding the square root of a number, say n, is finding out what number, speak a, multiplied by itself equals the number n. A × a = n ⇒ a2 = n. Thus a = √n. √84 = √(a × a )

84 = 9.165 × 9.165 and -9.165 × -9.165√84 = ± 9.165We know that 84 = 2 × 2 × 3 × 7In the most basic radical form √84 = √(2 × 2 × 3 × 7) = 2√21√84 = 9.1615138991 we cannot compose this as a rational variety of the form p/q. This is a non-terminating decimal. Hence the square root of 84 is irrational.

The square root of 84 or any type of number deserve to be calculation in many ways. Two of them are the approximation method and the long department method.

### Square root of 84 by Approximation Method

Take 2 perfect square numbers, among which is just smaller sized than 84 and the other is just higher than 84. √81 9 using the mean method, division 84 by 9 or 10.Let us divide through 10⇒ 84 ÷ 10 = 8.4Find the typical of 8.4 and 10.(8.4 + 10) / 2 = 18.4 ÷ 2 = 9.2√84 ≈ 9.2### Square source of 84 by the Long division Method

The long division method helps us find a much more accurate worth of square root of any type of number. Let"s see just how to discover the square source of by the long department method.

**Explore square roots utilizing illustrations and interactive examples**

The square root of any type of number have the right to be assumed come be in between the square source of the two nearest perfect squares of the number. For example, the square source of 108 lies between the square root of 100 and also 121. Therefore, 10 The square root of 84 is evaluated making use of the department method and rounded off to the nearest hundredth. √84 = 9.165. We round it off to the nearest hundredth together 9.17.

The square source of 84 is 9.165.The simplified form of radical form is 2√21

**√**84 is one irrational number.

**Example 1: **Charlie has actually made 84 cookies. If he needs to arrange castle on the tray as numerous cookies together the variety of rows, how can he arrange them? How numerous cookies will be left out of this arrangement?

**Solution: **Number of cookie per heat × number of rows = total cookies

Let cookie per heat = variety of rows = n

n × n = 84

n2 = **√**84

n = 9.1 (approximated to the nearest tenth)

He can arrange 81 cookies in 9 rows and also 3 cookies will be left out of the arrangement.

**Example 2: **Sam is playing v his blocks. That has constructed 7 blocks in a row and also extended the form in 12 columns.

a) How numerous blocks walk he must remove to make the rectangle come a square?

b) exactly how many an ext blocks go he have to make this rectangle come a square?

**Solution: **

7 block in a row × 12 columns = Total number of blocks

7 × 12 = 84 blocks

a) He needs to arrange them as a square base. N × n = 84

Since 84 is no a perfect square, let us make it a perfect square.

n × n = 81. We subtract 3 native 84 to make it a perfect square. 84 - 3 = 81

Thus he has to remove 3 blocks to build it as a square.

b) He needs to arrange them as a square base. N × n = 84

Since 84 is no a perfect square, let us make it a perfect square.

n × n = 100. We include 16 to 84 to do it a perfect square. 84 + 16 = 100

Thus he has to add 16 blocks much more to construct it as a square.

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