Warm up – Solve the Quadratic

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Presentation transcript:

Warm up – Solve the Quadratic

Questions over hw? (worksheet)

How do we solve quadratic inequalities? GSE Algebra II UNIT QUESTION: How are real life scenarios represented by quadratic functions? Today’s Question: How do we solve quadratic inequalities? Standard: MCC9-12..A.CED.1, A.REI.4

Solving Quadratic Inequalities Algebraically

Solve Quadratic Inequality Write in standard form Change the inequality to = and solve Plot the solutions on number line. *look for open/closed dots* Test the number 0 to see if it satisfies the inequality. 5. Write the answer in interval notation

1. Solve the Inequality. X X

2. Solve the Inequality.

3. Solve the Inequality.

Solving Quadratic Inequalities Graphically

Solve Quadratic Inequality Write in standard form. *variable must be on the left side* Change the inequality to = and solve Graph the solutions and y-int. Shade above for Greater Than and shade below for Less Than *look for open/closed dots* 5. Write the answer in interval notation

4. Solve and graph.

5. Solve and graph. **Divide by -1 and change the inequality sign!!**

6. Solve and graph.

CW/HW Textbook – Page 304 #35-46 all