GMAT 考满分题库

A certain square has sides of length x. If the length of each side is doubled, then which of the following represents the area of the resulting square, in terms of x?
  • A$$x^{2}$$
  • B$$2x^{2}$$
  • C4x
  • D$$4x^{2}$$
  • E$$x^{2}+4$$
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正确答案: D

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