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2/15 Adv. Alg Bell Ringer. Solve the following quadratic equations: x 2 + 7x + 12 = 0 x 2 – 8 = -2x. Homework: Quadratic Formula Independent Practice. 2/15 News and Notes. Perfection Award: 1 st Period HW Checked? Quiz Make-ups and retakes today in 218

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2/15 Adv. Alg Bell Ringer


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2 15 adv alg bell ringer

2/15 Adv. Alg Bell Ringer

Solve the following quadratic equations:

x2 + 7x + 12 = 0

x2 – 8 = -2x

Homework: Quadratic Formula Independent Practice

2 15 news and notes
2/15 News and Notes
  • Perfection Award: 1st Period
  • HW Checked?
  • Quiz Make-ups and retakes today in 218
  • Need to serve a detention? Today in 218
quiz make ups
Quiz Make-ups
  • 2nd: Ronnell, Jasmin H, Melissa, Masamusa, Durante, Zuleima, Edna.
  • 4th: Janet, Taunjear, Tyte’Anna, Abi, Darneisha, Jesus, Ariel, Jasmine
take 3 minutes to solve
Take 3 Minutes to solve
  • Choose one of the quadratic equations to solve in the next 3 minutes:
  • x2 – 9x + 3 = 0
  • 3x2 – 5x = -8
you just got
You Just Got

TREATED!

TREATED!

TREATED!

these can t be solved with our normal methods
These can’t be solved with our normal methods
  • WE NEED THE QUADRATIC FORMULA
  • This allows us to solve ANY quadratic equation.
  • So what is it?!
2 songs to help you
2 Songs to help you
  • Pop Goes the Weasel – Quadratic Formula
  • Go on YouTube tonight to find your favorite
  • So what is it again?
example 1
Example #1
  • Solve for x: x2 – 9x + 3 = 0
  • Step 2: What are the values of a, b, and c
    • A = 1
    • B = -9
    • C = 3
  • Step 3: Plug in to Quadratic Formula
  • Step 4: Solve!
example 2
Example 2

3x2 – 5x = 8

Step 1: Get in right form

3x2 – 5x – 8 = 0

Step 2: Find a, b, and c

A = 3

B = -5

C = -8

Step 3: Plug in to quadratic function

guided practice trace it back and forth
Guided Practice – Trace it back and forth…

I used the quadratic formula to solve an equation and got:

  • With your partner write the values of a, b, and c.

(b) Now write the quadratic equation I started with.

(c) Simplify the quadratic formula to find your solutions.

slide15

With your partner write the values of a, b, and c.

a = 1 b = 8 c = 9

(b) Now write the quadratic equation I started with.

0 = x2 + 8x + 9

(c) Simplify the quadratic formula to find your solutions.

independent practice
Independent Practice
  • # 1- 6 in textbook
  • Skip #4c,
  • BONUS: #5c, 6c, 1e
  • Question 3 Process: 1. Can I factor? 2. If not, use Quadratic Formula
  • Question 4: Just writing #3 in factored form of a FUNCTION