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1.What is the simplest form of the expression below?
(x + 3)²
A. x + 9
B. x² + 6x + 6
C. x² + 6x + 9
D. x² + 9

2.What is (x + 2)(x - 2) equal to?
A. x - 4
B. x² - 4
C. x² + 4
D. x + 4

3. Which of the following expressions is (x + 3)(x² - 3x + 9) equal to?
A. x² - 27
B. x² + 27
C. x3 - 27
D. x3 + 27