**Vedic Math Blog has been moved to http://vedicmath.vedantatree.com/. Please bookmark the new address for new and existing blogs.**

__Note__:Today, the topic which we are going to discuss is the 'General Procedure to Square any number'. Earlier we discussed about the squaring of numbers near base, however, general procedure is another nice formula to do the squaring and is applicable universally. The method or sutra is "

**Vertically and Crosswise**", but here it is used in a different sense; based on a procedure known as '

**Dwandwa Yoga**' or '

**Duplex Combination Process**' or '

**Duplex**'; denoted as (

**D**).

'

**Duplex**' term is used in two different sense; for squaring and for multiplication. And for current formula, it will be used in both the senses. If we are having a single or central digit, then 'Duplex' means squaring that digit (a

^{2}). Secondly it can be used for even digits number or on numbers having equidistant digits, then 'Duplex' means to double of cross multiplication of the equidistant numbers (2ab). This concept is very important to understand the current formula and will be used in future articles also. Let us see few example to understand it more:

For 1 digit –

**D(a)**=

**single digit**= a

^{2}

e.g. D(5) = 5

^{2}= 25

For 2 digits –

**D(ab)**=

**even digits number**= twice the product of the digits (2ab)

e.g. D(26) = 2(2)(6) = 24

For 3 digits –

**D(abc)**=

**product of equidistant digits from center and square of center digits**

= twice the product of the outer digits (2ac) + the square of the middle digit (b

^{2})

e.g. D(734) = 2(7)(4) + 3

^{2}

= 56 + 9 = 65

For 4 digits –

**D(abcd)**=

**product of equidistant numbers**

= twice the product of the outer digits (2ad) + twice the product of the inner digits (2bc)

e.g. D(1034) = 2(1)(4) + 2(0)(3)

= 8 + 0 = 8

For 5 digits – e.g.

**D(10345) = product of equidistant digits and square of center digits**

= 2(1)(5) + 2(0)(4) + 3

^{2}

= 10 + 0 + 9 = 19

and so on. This is called

**Duplex.**

Now, let us come to original question i.e. how to square a number. And the square of any number is just the total of its Duplexes.

For Example,

**34**

^{2}= 1156= D(3) = 9, D(34) = 24, D(4) = 16

Combining these three results in the usual way, we get

= 9 | 24 | 16

Now add these results as

= 9 | 4 | 6

2 1

= 9 | 5 | 6

2

= 11 | 5 | 6

= 1156

**56**

^{2}= 3136D(5) = 25, D(56) = 60, D(6) = 36

by combining, we get 25 / 60 / 36 = 3136

Equivalent

**Algebraic Expression is**: (10a + b)

^{2}= 100(a

^{2}) + 10(2ab) + b

^{2}.

This method can also be explained by multiplying a number by itself using the general multiplication method.

**Note**:- If a number consists of n digits, its square must have 2n or 2n-1 digits.

Following are some more examples:

**263**

^{2}=D(2) = 4, D(26) = 24, D(263) = 48, D(63) = 36, D(3) = 9

4 / 24 / 48 / 36 / 9 =

**69169**

**4332**

^{2}=D(4) = 16, D(43) = 24, D(433) = 33, D(4332) = 34, D(332) = 21, D(32) = 12, D(2) = 4

16 / 24 / 33 / 34 / 21 / 12 / 4 =

**18766224**

**3247**9 / 12 / 28 / 58 / 46 / 56 / 49 =

^{2}=**10543009**

**46325**16 / 48 / 60 / 52 / 73 / 72 / 34 / 20 / 25 =

^{2}=**2146005625**

We hope this method will help you in squaring of any number quickly. If you find this difficult, you may use another method which we have discussed earlier( Squaring numbers near base ). Every method will become easy with practice. In our next article, we shall discuss about the cubing of the number.

**If you like the article, you may contribute by:**

- Posting your comments which will add value to the article contents
- Posting the article link on Social Media using the Social Media Bookmark bar
- Connecting with 'VedantaTree' on Facebook (https://www.facebook.com/VedantaTree)

## 11 comments:

Can you please find the square of 587 using the above rule?

According to this rule,

D(5)=25, D(58)=2x5x8=80, D(587)=2x5x7+8x8=134, D(87)=2x8x7=112, D(7)=49

Hence,

258013411249

Now how to combine the digits?

25 80 134 112 49

Combine the digits from left to right

Make groups as:

[5+8=13], [0+13=13], [4+11=15], [2+4=6]

Rest procedure is same and finally, you get 344569

Hope it helps!

25 80 134 112 49

Combine the digits from left to right

Make groups as:

[5+8=13], [0+13=13], [4+11=15], [2+4=6]

Rest procedure is same and finally, you get 344569

Hope it helps!

Please help me find square of 189

It comes to be

1/16/82/144/81

Now how to add them?

And please a way to add in case of other numbers as well..

Please help me find square of 189

It comes to be

1/16/82/144/81

Now how to add them..

And please explai if there is any trick to add

Please help me find square of 189

It comes to be

1/16/82/144/81

Now how to add them..

And is there any trick to add them?

Combining is always the problem

D(503)???

This is very helpful. Thankyou.

D(x²+x-1)

## Post a Comment