Question

evaluate 98^2 using identity (a-b)^2 =a^2-2ab+b^2



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Answer 1

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Answer 2

Answer:

9604

Step-by-step explanation:

(100-2)^2

write (98)^2 as ( 100 - 2)^2

=  (a-b) ^2

So, (100-2)^2 = (100)^2 + (2)^2 - 2(100)(2)

= 10000 + 4 - 400

=10004-400 = 9604

Therefore 98^2 = 9604

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