Discriminant

What is the discriminant and how is it related to the Quadratic Formula?

By Elle Greene

The discriminant ​tells you the number of solution of a quadratic formula.

​Memorizing the value of the discriminant will help you before solving the full quadratic.

the discriminat is the numeratior of the radical expression.​

Formula: D = b² − 4ac Reminder: Ax² + bx+C

Use the formula from the previous slide to see if ​you can find the discriminant.

Let's see if you understood.....​

Multiple Choice

What is the discriminant? Use your notes if you get stuck... 2 minutes to answer.

• 40

• 32

• -40

• -32

Multiple Choice

What is the discriminant? Use your notes if you get stuck... 2 minutes to answer.

• 25

• 73

• -25

• -73

Multiple Choice

What is true of the number of solutions who's quadratic has a discriminant of -24?

• Two unequal real roots.

• only one real root

• no roots

• no real roots or two complex roots

Multiple Choice

What is true of the number of solutions who's quadratic has a discriminant of 0?

• Two unequal real roots.

• only one real root

• no roots

• no real roots or two complex roots

Multiple Choice

What is true of the number of solutions who's quadratic has a discriminant of 125?

• Two unequal real roots.

• only one real root

• no roots

• no real roots or two complex roots

Multiple Select

How do you feel about the discriminant?

• I got this🤞🏾

• Naw I need more help 😔

• Can I get another one to see?

• Don't think Im ever gonna get this

  Mrs. G 😩