Question

Find the value of 399^2-398 using identify

Answer 1

Answer: 797

Step-by-step explanation:

Therefore, A/q

= 399^2 - 398^2

= ( 399 + 398 )( 399 - 398). { By using identiy a^2 - b^2 = ( a + b )( a - b ) }

= 797 × 1

= 797

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