What is identity ?

Identity :

• An identity is an equation that is always true, irrespective of what values are substituted.
• $2 x + 3 x = 5 x$. is an identity because $2 x + 3 x$ will always equal $5x$ regardless of what value we substitute in $x$. 
• Identities can be written with the sign ≡, so the example could be written as $2 x + 3 x ≡ 5 x$.    

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Updated on: 10-Oct-2022

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