SECTION 3.9SECTION 3.9SOLVING QUADRATIC SOLVING QUADRATIC

INEQUALITIESINEQUALITIES

Feb 25Feb 25thth 2010 2010

p. 97 in your bookp. 97 in your book

TOMORROW’S QUIZ…TOMORROW’S QUIZ… Sections 3.3 & 3.9Sections 3.3 & 3.9

Graphing using a table (standard form)Graphing using a table (standard form) Interval of Increase / DecreaseInterval of Increase / Decrease Find the Slope (Rate of Change)Find the Slope (Rate of Change) Calculate Average Rate of ChangeCalculate Average Rate of Change Is the ordered pair a solution?Is the ordered pair a solution? Graphing Quadratic InequalitiesGraphing Quadratic Inequalities Solving Quadratic InequalitiesSolving Quadratic Inequalities

Is this a solution?Is this a solution?

– Is the point ( 2 , 1 ) a solution?Is the point ( 2 , 1 ) a solution?

2 2 2y x x

Graph the inequality?Graph the inequality?2 6 4y x x

Solve the InequalitySolve the Inequality

We can solve by We can solve by

finding vertex and finding vertex and

interceptsintercepts

2 4 3 0x x

Solve the InequalitySolve the Inequality

We can solve by We can solve by

finding vertex finding vertex

and interceptsand intercepts

2 5 36 0x x

Try these on your paper…Try these on your paper…

You decide how to solve…use method of You decide how to solve…use method of your choice.your choice.

p. 99 #’s 31, 32, 33p. 99 #’s 31, 32, 33