Use the formula to find the vertex

The video tutorial explains how to find the vertex of a quadratic function without completing the square. It introduces the vertex formula, which involves using the coefficients of the quadratic equation. The tutorial provides a step-by-step example of calculating the vertex using the formula, demonstrating the process with a specific quadratic equation. The video concludes with a summary of the method as a quick and easy way to find the vertex.

What is an alternative method to completing the square for finding the vertex of a quadratic function?

• Factoring the quadratic

• Graphing the function

• Using the vertex formula

• Using the quadratic formula

In the vertex formula, what does the expression -B/2A represent?

• The y-coordinate of the vertex

• The x-coordinate of the vertex

• The axis of symmetry

• The maximum value of the function

What is the first step in applying the vertex formula to find the vertex of a quadratic function?

• Calculate the y-coordinate using the formula

• Find the opposite of B divided by 2A

• Determine the value of C

• Graph the quadratic function

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

• 5

• -5

• -4

• 4

What is the final vertex of the quadratic function in the example?

• (4, 5)

• (4, -5)

• (-4, 5)

• (-4, -5)