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(a + b) = a^2 + 2ab + b^2

(a - b)^2 = a^2 - 2ab + b^2 or you can work like this:

[a + (-b)]^2 = a^2 + 2a(-b) + (-b)^2

(a - b)^2 = a^2 - 2ab + b^2

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Q: How do the squares of sums and differences relate?
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What two square numbers total 21?

There is no pair of perfect squares that sums to 21. And the question is pointless if it is not about perfect squares because in that case there are infinitely many answers.There is no pair of perfect squares that sums to 21. And the question is pointless if it is not about perfect squares because in that case there are infinitely many answers.There is no pair of perfect squares that sums to 21. And the question is pointless if it is not about perfect squares because in that case there are infinitely many answers.There is no pair of perfect squares that sums to 21. And the question is pointless if it is not about perfect squares because in that case there are infinitely many answers.


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Difference between the sum of the squares and the square of the sums of n numbers?Read more:Difference_between_the_sum_of_the_squares_and_the_square_of_the_sums_of_n_numbers


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http://en.wikipedia.org/wiki/Explained_sum_of_squares


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Alike is the same as Differences means subtractions Sums means additions Quotients means divisions Products means multiplications


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Carlos J. Moreno has written: 'Sums of squares of integers'