Question

find the squares of 105 by the short method​

Answer 1

Answer:

See this attachment..

Step-by-step explanation:

The square root of 105 is the inverse of the square of a number (a) such that a × a = 105. The number 105 have both positive and negative square root. The square root can be a real or imaginary number. We will now find the value of the square root of 105 using the long division method and the approximation method.

Square root of 105: √105 = 10.24695

Square of 105: (105)2 = 11025

The square root of 105 in decimal form is 10.2469

The square root of 105 is expressed as √105 in radical form.

The square root of 105 is expressed as (105)1/2 in exponential form.

The square root of 105 is a non-terminating and non-repeating number.

Hence, it cannot be represented in the form of p/q where q ≠ 0.

Therefore, the square root of 105 is an irrational number.

Square Root of 105 Using Approximation Method

Find two consecutive perfect squares among which 105 lies.

In this case, the numbers are 10 (100) and 11 (121).

So, the whole number part of the square root of 105 is 10

Now, for the decimal part we will use the below-given formula:

(Given number – Smaller perfect square) / (Greater perfect square – smaller perfect square)

= (105 – 100)/(121 – 100) = 5/21 = 0.238

Hence, the approx. value of the square root of 105 by the approximation method is 10.238

Square Root of 105 By Long Division

Now we will calculate the square root of 105 by the long division method.

Start pairing the digits by placing a bar on top of them from the right side of number 105 in pairs of two. Here we will have two pairs 05 and 1(pairing from right).

Now, find a number(n) whose square is ≤ 1. The value of n will be 1 as 1 × 1 = 1≤ 1.

We get the quotient (1). Now, by adding divisor n with itself and get the new divisor 2n (2).

Drag the next pair down (new dividend becomes 005) and find a number (A) such that 2A × A ≤ 5. In this case, the value of A will be 0.

Now, put a decimal after 5 in the dividend part and after 1 in the quotient part simultaneously. Also, place 3 pairs of zero in the dividend after the decimal (105. 00 00 00) and repeat the above step for the remaining three pairs of zero.

So, we get the value of the square root of √105 = 10.246 by the long division method...

Hope its help..