9 Solving by Factoring.notebook

1

March 01, 2017

Mar 23­1:31 PM

Solving Quadratic Equations by FactoringAgenda

Reminders

Wednesday Warm-Up 1.

2.

Warm-Up

Notes

Practice #1-12

Test Friday

Gradebook Closes

Friday If ab = 0, what do you know about either a or b?

Essential QuestionHow can I find the roots of a

quadratic function by

factoring? As measured by

getting 80% correct on the

homework.

Solve for x. 3(x-2)+5=-4

Mar 1­8:53 AM

Questions, Comments, Concerns??

9 Solving by Factoring.notebook

2

March 01, 2017

Mar 23­1:31 PM

Solving Quadratic Equations by FactoringEssential Question

How can I find the roots of a quadratic function by factoring? As

measured by getting 80% correct on the homework.

Zero Product Property:

Solve the equations below by factoring.

Mar 23­1:31 PM

Solving Quadratic Equations by FactoringEssential Question

How can I find the roots of a quadratic function by factoring? As

measured by getting 80% correct on the homework.

9 Solving by Factoring.notebook

3

March 01, 2017

Mar 23­1:31 PM

Solving Quadratic Equations by FactoringEssential Question

How can I find the roots of a quadratic function by factoring? As

measured by getting 80% correct on the homework.

Mar 23­1:31 PM

Solving Quadratic Equations by FactoringEssential Question

How can I find the roots of a quadratic function by factoring? As

measured by getting 80% correct on the homework.

9 Solving by Factoring.notebook

4

March 01, 2017

HW: Practice #1­12, NO WORK, NO CREDIT, NO KIDDING!!!

9 Solving by Factoring.notebook

5

March 01, 2017

Mar 23­1:31 PM

Solving by Factoring HW HelpNo WORK, No CREDIT, No KIDDING!!

1 & 2. These quadratics are already factored. Set each factor equal to zero and solve for x!3. This is a difference of squares: a2 ­ b2 = (a­b)(a+b)4. 6.

5. Move everything to one side!7. Factors of ­15 that add to 2 are ­3 and 5.8. Factor out a 2 before you start!9. Your FACTORS will always have opposite signs than the x­intercepts. So if your x­intercept is 1, your factor would be (x ­ 1)10. Distribute w to the parenthesis and subtract 252 from both sides. The factors of ­252 that add to ­9 are 12 and ­21. Once you solve for w, remember that you can't have a negative width!11. Factor out a negative 2. Your answer should be 1 second.12. Area = length x width. Your quadratic should be w2 + 3w ­ 70 = 0. Factor, solve, and don't forget to also find the length!

Need extra pointers? Come to tutorials!!