Math, asked by vijayalakshmi3101060, 5 months ago

3. Using a suitable identity, evaluate: a) 91²-9² b) 999²

plz answer in sum

Answers

Answered by Imblank

1

Answer:

91²-9²

= (91+9)(91-9)

= 100×82

= 8200

999²

= (1000-1)²

= (1000)²-2.1000.1+(1)²

= 1000000-2000+1

= 998001

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