Q. 5 K5.0( 2 Votes )

Evaluate the following by using the identities:

12.12 – 7.92

Answer :

We know that


(a2 – b2) = (a – b) × (a + b)


12.12 – 7.92 = (12.1 + 7.9) (12.1 – 7.9)


12.12 – 7.92 = 20 × 4.2 = 84


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