Square root of 320

The square root is a number that, when multiplied by itself, results in the original number whose square root is to be found. Know that the square root of 320 is ±17.88854382.

We will see here more about the square root of 320. As defined, the square root is just the opposite (inverse) of squaring a number, so, squaring 17.8885… will result in 320. The positive value, 17.888… is the solution of the equation x² = 320.

It contains both positive and a negative root, where the positive root is called the principal square root. The square root of 320 is expressed as √320 in radical form. In exponential form, it is written as (320)^1/2  .

The simplest radical form of √320 is 8√5. We will see how to obtain the simplest radical form further in this article.
We now came to a point where we can say that:

• 320 is a non-perfect square.

• √320 is an irrational number.
   

Let us now find how we got this value of 17.888… as a square root of 320.

We will use these methods below to find.

• Prime factorization method

• Long division method

• Approximation/Estimation method

The prime factorization of 320 involves breaking down a number into its factors.

Factorize 320 by prime numbers, and continue to divide the quotients until they can’t be separated anymore. 

• Find the prime factors of 320.

• After factoring 320, make pairs out of the factors to get the square root.

•  If there exist numbers that cannot be made pairs further, we place those numbers with a “radical” sign along with the obtained pairs.

Prime factorization of 320 = 2×2×2×2×2×2×5

For 320, three pairs of factors 2 are obtained, but a single 5 is remaining.

So, it can be expressed as √320 = √(2×2×2×2×2×2×5) = 2×2×2√5 = 8√5.

8√5 is the simplest radical form of √320.
 

Long Division method is used for obtaining the square root for non-perfect squares, mainly. It usually involves the division of the dividend by the divisor, getting a quotient and a remainder for non-perfect squares. To make it simple it is operated on divide, multiply, subtract, bring down and do-again.

To calculate the square root of 320:

Step 1: On the number 320.000000, draw a horizontal bar above the pair of digits from right to left.

Step 2 :Find the greatest number whose square is less than or equal to 3. Here, it is 1, Because 1²=1 < 3.

Step 3 : Now divide 3 by 1 such that we get 1 as a quotient and then multiply the divisor with the quotient, we get 1.

Step 4: Subtract 1 from 3. Bring down 2 and 0 and place it beside the difference 2.

Step 5: Add 1 to the same divisor, 1. We get 2.

Step 6: Now choose a number such that when placed at the end of 2, a 2-digit number will be formed. Multiply that particular number by the resultant number to get a number less than 220. Here, that number is 7. 

27×7=189<220. In quotient’s place, we also place that 7.

Step 7: Subtract 220-189=31.  Add a decimal point after the new quotient 17, again, bring down two zeroes and make 31 as 3100. Simultaneously add the unit’s place digit of 27, i.e., 7 with 27. We got here, 34. Apply Step 5 again and again until you reach 0. 

We will show two places of precision here, and so, we are left with the remainder, 19456 (refer to the picture), after some iterations and keeping the division till here, at this point 

             
Step 8 : The quotient obtained is the square root. In this case, it is 17.888….

Estimation of square root is not the exact square root, but it is an estimate, or you can consider it as a guess.

Follow the steps below:

Step 1: Find the nearest perfect square number to 320. Here, it is 289 and 324.

Step 2: We know that, √289=±17 and √324=±18. This implies that √320 lies between 17 and 18.

Step 3: Now we need to check √320 is closer to 17.5 or 18. Since (17.5)²=306.25 and (18)²=324. Thus, √320 lies between 17.5 and 18.

Step 4: Again considering precisely, we see that  √320 lies close to (18)²=324. Find squares of (17.7)²=313.29 and (17.9)²= 320.41.

We can iterate the process and check between the squares of 17.8 and 17.89 and so on.

We observe that √320 = 17.88…

• Negative Square root - The negative square root of 320 is √-320.

• Trigonometry - This branch of mathematics deals with the functions of angles.

• Exponential form - An algebraic expression that includes an exponent. It is a way of expressing the numbers raised to some power of their factors, or a way to write a number that is multiplied by itself more than one time.  Ex: 5× 5 × 5 × 5 = 625 Or, 5 ⁴ = 625, where 5 is the base, 4 is the exponent 

• Prime Factorization - Expressing the given expression as a product of its factors Ex: 52=2 × 2 × 13 

• Prime Numbers - Numbers which are greater than 1, having only 2 factors as →1 and Itself. Ex: 1,3,5,7,....

• Rational numbers - The Number which can be expressed as p/q, where p and q are integers and q not equal to 0 are called Rational numbers

• Irrational numbers - Numbers which cannot be expressed as p/q, where p and q are integers and q not equal to 0 are called Irrational numbers. 

• Perfect square numbers - Perfect square numbers are those numbers whose square roots do not include decimal places. Ex: 4,9,25.

• Non-Perfect square numbers -  Those numbers whose square roots comprise decimal places. Ex : 3, 10, 29