Problem 7 - Entrance Test

Which expression is equivalent to (x + 4)²?

A. A) x² + 16B. B) x² + 8x + 16C. C) x² + 4x + 16D. D) x² + 8x + 8

Correct: B

Expand: (x + 4)² = x² + 2·x·4 + 4² = x² + 8x + 16.