What is the vertex of the parabola y ⚌ -2(x + 3)² + 4?

(3, 4)

(4, 3)

(3, -2)

(-3, 4)

What is the vertex of y ⚌ 3x² + 9?

(0, 9)

(3, 9)

(9, 0)

(-3, 9)

Which of the following is the first INCORRECT step in finding the x-intercepts of y ⚌ 5(x − 8)² + 6?

Step 1: Set y equal to zero

Step 2: Subtract 6 from each side.

Step 3: Divide each side by 5.

Step 4: Add 8 to each side.

Solve x² = 25.

x = 5

x = 0 or 5

x = 5 or -5

x = 0, 5, or -5