Solution:
Concept- In order to solve this problem, we must first define the supplied number as the sum of two integers, each of whose square is easy to determine, and then expand the number in the appropriate way using the factorisation of the polynomial formula. Then, simplify it even further to obtain the outcome.We know that
Split the terms
According to the formulaWe have
Substitute values
Then, the square of 205 is 42025 .Hence, the correct answer is option 2.
