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SAT Numbers

Number Theory Level 1

Let $x$ and $y$ be integers. If $x + y$ is odd, which of the following is true about $(x+y)^{2}+xy?$

It is even It is odd It is even if

x

is even It is even if

y

is even It is even if

xy

is negative

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Excel in math and science

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by Tatiana Georgieva

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