Question

find the square of 81 without actual multiplication​

Answer 1

Answer:

Step-by-step explanation:

let 81 = (80+1)2

= a2+2ab+b2

=(80)2 + 2 (80)(1) + (1)2

=6400+160+1

=6561

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Answer 2

Answer:

Its answer is 6561.

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