Question

Using suitable identity evaluate : 102 x 98​

Answer 1

Answer:

(100+2)(100-2)

= 100² + (2+(-2))100 + (2×-2)

= 10000 -400-4

= 9596

Answer 2

Answer:

9996

Step-by-step explanation:

Here, we use the identity: (a+b)(a-b) = a²-b²

Thus,

102×98= (100+2)(100-2)

= 100²-2²

= 10000-4

= 9996.

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