1.

What is the expansion of the series (xy + 2)2?

A. x<sup>2</sup> + y<sup>2</sup> + 4
B. xy<sup>2</sup> + 4 +2xy
C. x<sup>2</sup>y<sup>2</sup> + 2xy + 4
D. x<sup>2</sup>y<sup>2</sup> + 4xy + 4
Answer» E.


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