1.

Evaluate the following by using identity 3 (81)^2 -(19)^2I will mark the brainliest ..

Answer»

Hey your ans is here

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given

(81)2-(19)2

this is forming identity

a2-b2=(a+b)(a-b)
so

(81)2-(19)2=(81+19)(81-19)=(100)(62)

so

ANSWER is 6200

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