If a question says solve the sum of the squares of 3 and 10, you would multiply 3 by 3 to get 9 and 10 by 10 to get 100, and add the two numbers to get 109.
32 + 102 = 9 + 100 = 109
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There is a calculation error.
2 because 22+42 = 20
8081 can be the sum of two perfect squares because its perfect squares are 41 x41+80x80=1681+6400. Answer=1681+6400
The sum of the squares of the first 20 natural numbers 1 to 20 is 2,870.
It is Fermat's theorem on the sum of two squares. An odd prime p can be expressed as a sum of two different squares if and only if p = 1 mod(4)