Express `(1+a^2)(1+b^2)(1+c^2)` as the sum of two squares.

Express (1+a^(2))(1+b^(2)) as the sum of two squares.

Express (1+a^2)(1+b^2) as the sum of two squares.

Express (x^(2)+a^(2))(y^(2)+b^(2))(z^(2)+c^(2)) as the sum of two squares.

Let's express a^2 + frac(1)(a^2) - 3 as the difference of two squares.

The sum of the squares of the first n positive integers 1^2 + 2^2 + 3^2 + ………+ n^2 is (n(n +1)(2n+1))/(6) . What is the sum of the squares of the first 9 positive integers?

Express each of the following expressions as the sum of two squares: (1+x^(2))(1+y^(2))(1+z^(2))

Express each of the following expressions as the sum of two squares: (1+x^(2))(1+y^(2))

Express each of the following expressions as the sum of two squares: (a^(2)+b^(2))(c^(2)+d^(2))

Which on of the following algebric expression must be added a^2 + b^2 so that the sum is a perfect square. 1) 0 2) 2ab 3)4ab 4)-1

Which on of the following algebric expression must be added a^2 + b^2 so that the sum is a perfect square. 1) 4ab 2)2ab 3)2( a^2 + b^2 ) 4)ab