Find the vertex of a parabola using the formula

The video tutorial discusses the concept of completing the square, sharing the instructor's personal struggles and eventual understanding. It offers an alternative method using the vertex formula for those who find completing the square challenging. The tutorial explains the vertex and axis of symmetry in quadratic functions, providing a step-by-step guide to calculate the vertex. The video concludes with encouragement for students to continue learning and exploring different methods.

What was the speaker's initial reaction to learning about completing the square?

• They ignored it completely.

• They were confused and disliked it.

• They found it easy and enjoyable.

• They understood it immediately.

Why does the speaker sometimes prefer not to complete the square?

• It is too simple.

• It can be extra work with odd numbers and fractions.

• It is not applicable to all quadratic equations.

• It requires a graphing calculator.

What is the vertex of a quadratic function?

• The point where the graph intersects the y-axis.

• The point where the graph intersects the x-axis.

• The highest or lowest point on the parabola.

• The midpoint of the parabola.

How is the axis of symmetry of a parabola described?

• As a horizontal line.

• As a diagonal line.

• As a vertical line.

• As a curved line.

What formula is used to find the x-value of the vertex?

• A / B

• A + B / 2C

• -B / 2A

• C / A

In the example provided, what is the x-coordinate of the vertex?

• 4

• 5

• 3

• 2

What is the y-coordinate of the vertex in the example?

• 0

• 12

• -24

• -12