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What is the product of the equation x^2 + y^2?

  1. x^4 + y^4

  2. x^2 + y^2

  3. 2xy

  4. x^2y^2

The correct answer is: x^2 + y^2

This equation is already in its simplest form and cannot be simplified further. A only squares the x and y individually, while C only takes the product of the variables and does not include the exponents. D is incorrect since it multiplies the two variables and not their squares. Therefore, B is the correct answer and the product of x^2 + y^2 remains the same.