Quadratic Formula

https://www.youtube.com/watch?v=ZBVYahon6EY

Pre-req's for this lesson:

- "plug it in"

- identify coefficients

- simplify radicals

- add/subtract

- memorize a long formula!

x2 + 7x + 12

Objective: use the quadratic formula to find x!

x2 + 7x + 12STEP 1: identify coefficients:

STEP 2: plug it into the formula!

2a-b ± b2 - 4ac

a=_____ b=_____ c=_____

2a-b ± b2 - 4ac

a=1 b=7 c=12

Try it on your own! **find x using the Q.F.

x2 - 6x + 7

Try it on your own! **find x using the Q.F.

x2 - 4x + 6