1. Solve by factoring..

3. GSE Algebra I Today’s Question: When does a quadratic have an imaginary solution? Standard: MCC9-12..A.REI.4b

4. Solving Quadratic Equations by Taking Square Roots

5. Solving with Square Roots 1.Get x 2 or binomial squared by itself 2.Take the square root of BOTH sides of the equals sign 3.Don’t forget the  sign 4.Simplify

6. Solve by Taking Square Roots

16. Falling Objects! Use h = -16t 2 + h 0 Height of the object AFTER it has fallen TIME after the object has dropped Object’s INITIAL height

17. Example The tallest building in the USA is in Chicago, Illinois. It is 1450 ft. tall. How long would it take a penny to drop from the top of the building to the ground?

18. For a period of 48 months, the average monthly operating costs for a small business C (in dollars) is approximated by the model C = 0.55t 2 + 550 where t is the number of months. During which month was the average operating cost $1430?Example

19. Application The formula for the volume of a cylinder is V =. Solve the formula for r.

20. Textbook p. 536 #2, 20, 22 p. 537 #41 – 45

21. Homework Practice Sheet