Advanced Math practice question

Answer: 3

A sum of two squares is 0 only when both squares are 0, so x = 4 and y = −1, and x + y = 3.

Common wrong answers

If you answered 0

0 confuses the sum of squares with x + y.

If you answered 5

5 uses y = 1.

If you answered -3

−3 has both signs wrong.

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