What is the meaning of duplex in vedic math?

Duplex in vedic math , is a process to find square of any number , we use the formulas in duplex method

D( X ) = X

^{2}

D( XY ) = 2 XY

D( XYZ ) = ( 2XZ ) + Y

^{2}

D( ABCD ) = ( 2AD ) + ( 2BC )

D( ABCDE ) = ( 2AE ) + ( 2BD ) + C

^{2}

We can understand how these formulas works , by taking and example As :

Find value of 43

^{2}, by duplex method ,

So,

D ( 4 ) = 4

^{2}= 16

D ( 43 ) = 2 $\times $ 4 $\times $ 3 = 24

D ( 3 ) = 3

^{2}= 9 = 09

Now we add them As :

So,

43

^{2}= 1849 , by Duplex method

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