Square Root of 440

The square root is the inverse of the square of the number. 440 is not a perfect square. The square root of 440 is expressed in both radical and exponential form. In radical form, it is expressed as √440, whereas in exponential form as (440)^(1/2). √440 ≈ 20.976, which is an irrational number because it cannot be expressed in the form of p/q, where p and q are integers and q ≠ 0.

The prime factorization method is used for perfect square numbers. However, the prime factorization method is not used for non-perfect square numbers where the long-division method and approximation method are used. Let us now learn the following methods:

• Prime factorization method

• Long division method

• Approximation method

The product of prime factors is the prime factorization of a number. Now let us look at how 440 is broken down into its prime factors:

Step 1: Finding the prime factors of 440 Breaking it down, we get 2 x 2 x 2 x 5 x 11: 2^3 x 5^1 x 11^1

Step 2: Now we found the prime factors of 440. The second step is to make pairs of those prime factors. Since 440 is not a perfect square, therefore the digits of the number can’t be grouped in pairs.

Therefore, calculating 440 using prime factorization is impossible.

The long division method is particularly used for non-perfect square numbers. In this method, we should check the closest perfect square number for the given number. Let us now learn how to find the square root using the long division method, step by step.

Step 1: To begin with, we need to group the numbers from right to left. In the case of 440, we need to group it as 40 and 4.

Step 2: Now we need to find n whose square is 4. We can say n as ‘2’ because 2 x 2 is equal to 4. Now the quotient is 2, and after subtracting 4 - 4, the remainder is 0.

Step 3: Now let us bring down 40 which is the new dividend. Add the old divisor with the same number: 2 + 2 = 4, which will be our new divisor.

Step 4: The new divisor will be the sum of the dividend and quotient. Now we get 4n as the new divisor, we need to find the value of n.

Step 5: The next step is finding 4n × n ≤ 40. Let us consider n as 5, now 4 x 5 x 5 = 100, which is greater than 40. Let us try n as 1, 4 x 1 x 1 = 4 which is less than or equal to 40.

Step 6: Subtract 40 from 4, the difference is 36, and the quotient is 21.

Step 7: Since the dividend is less than the divisor, we need to add a decimal point. Adding the decimal point allows us to add two zeroes to the dividend. Now the new dividend is 3600.

Step 8: Now we need to find the new divisor that is 41 because 412 x 8 = 3288 Step 9: Subtracting 3288 from 3600, we get the result 312.

Step 10: Now the quotient is 20.9 Step 11: Continue doing these steps until we get two numbers after the decimal point.

So the square root of √440 is approximately 20.976.

The approximation method is another method for finding square roots. It is an easy method to find the square root of a given number. Now let us learn how to find the square root of 440 using the approximation method.

Step 1: Now we have to find the closest perfect squares of √440. The smallest perfect square less than 440 is 400, and the largest perfect square greater than 440 is 441. √440 falls somewhere between 20 and 21.

Step 2: Now we need to apply the formula that is (Given number - smallest perfect square) / (Greater perfect square - smallest perfect square). Going by the formula (440 - 400) ÷ (441 - 400) = 40 / 41 ≈ 0.9756. Using the formula, we identified the decimal point of our square root. The next step is adding the value we got initially to the decimal number which is 20 + 0.9756 ≈ 20.976, so the square root of 440 is approximately 20.976.

• Square root: A square root is the inverse of a square. Example: 4^2 = 16 and the inverse of the square is the square root, that is √16 = 4.

• Irrational number: An irrational number is a number that cannot be written in the form of p/q, where q is not equal to zero, and p and q are integers.

• Principal square root: A number has both positive and negative square roots; however, it is always the positive square root that has more prominence due to its uses in the real world. That is the reason it is also known as a principal square root.

• Prime factorization: It is the method of expressing a number as the product of its prime factors.

• Approximation method: This method is used to find an approximate value of the square root of a number that is not a perfect square.