Download presentation

Presentation is loading. Please wait.

1
**5.6 Quadratic Formula & Discriminant**

OBJ: To find the discriminant & tell how many (and what type) of solutions there are & to a quadratic equation solve quadratic equations using the quadratic formula & use the quadratic formula in real-life situations 5.6 Quadratic Formula & Discriminant Do Now:

2
Discriminant b2 - 4ac The discriminant tells you how many solutions and what type you will have. If it is: positive, there are 2 real solutions negative, there are 2 imaginary solutions zero, there is 1 real solution

3
**Ex 1: 9x2+6x-4=0 a=9, b=6, c=-4 b2-4ac=(6)2-4(9)(-4) =36+144=180**

2 real solutions c. 9x2+6x+5=0 a=9, b=6, c=5 b2-4ac=(6)2-4(9)(5) =36-180=-144 2 imaginary solutions Find the discriminant and give the number and type of solutions. 9x2+6x+1=0 a=9, b=6, c=1 b2-4ac=(6)2-4(9)(1) =36-36=0 1 real solution

4
Quadratic Formula Use the quadratic formula when you can’t factor to solve a quadratic equation. (or when you’re stuck on how to factor the equation)

5
Ex 2: a. 3x2+8x=35 3x2+8x-35=0 a=3, b=8, c= -35 OR

6
b. -2x2=-2x+3 -2x2+2x-3=0 a=-2, b=2, c= -3

Similar presentations

© 2021 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google