What are the x-intercepts of f(x) = 9(x − 3)(x + 6)?

(3, 0) and (-6, 0)

(-3, 0) and (6, 0)

(-3, 0) and (9, 0)

(9, 0) and (-6, 0)

What are the x-intercepts of f(x) ＝ -4x(x + 5)?

(0, 0) and (5, 0)

(4, 0) and (5, 0)

(0, 0) and (-5, 0)

(-4, 0) and (5, 0)

What is the vertex of f(x) ＝ 2(x + 2)(x + 8)?

(5, -18)

(-5, -18)

(10, 18)

(-10, 18)

What is the vertex of f(x) ＝ (x − 8)(x − 2)?

(5, 9)

(5, -9)

(5, 15)

(5, -15)