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2/15 Adv. Alg Bell Ringer

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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  1. 2/15 Adv. Alg Bell Ringer Solve the following quadratic equations: x2 + 7x + 12 = 0 x2 – 8 = -2x Homework: Quadratic Formula Independent Practice

  2. 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

  3. Quiz Make-ups • 2nd: Ronnell, Jasmin H, Melissa, Masamusa, Durante, Zuleima, Edna. • 4th: Janet, Taunjear, Tyte’Anna, Abi, Darneisha, Jesus, Ariel, Jasmine

  4. 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

  5. You Just Got TREATED! TREATED! TREATED!

  6. 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?!

  7. 2 Songs to help you • Pop Goes the Weasel – Quadratic Formula • Go on YouTube tonight to find your favorite • So what is it again?

  8. 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!

  9. 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

  10. 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.

  11. 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.

  12. 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

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