Find the value of each of the following without calculating squares.
(i) 272
– 262
(ii) 1182
– 1172
Answers
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a²-b² = (a+b)(a-b)
I)27²-26²= (27+26)×(27-26)= 53×1=53
II)118²-117²=(118+117)(118-117) = 235×1=235
therefore, answer is 53&235 respectively
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youse the Book ,
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