1. Warm-up
Solve.

2. Solving Quadratic Equations by Taking Square Roots

3. Solving with Square Roots
Get x2 or binomial squared by itself
Take the square root of BOTH sides of the equals sign
Don’t forget the  sign
Simplify

4. Solve by Taking Square Roots

5. Solve by Taking Square Roots

6. Solve by Taking Square Roots

7. Solve by Taking Square Roots

8. Solve by Taking Square Roots

9. Solve by Taking Square Roots

10. Solve by Taking Square Roots

11. Solve by Taking Square Roots

12. Solve by Taking Square Roots

13. Solve by Taking Square Roots

14. Use h = -16t2 + h0 Falling Objects!
Height of the object after it has fallen
Object’s initial height
# of seconds after the object is dropped

15. Example
The 2nd 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?

16. Application Problem #2
For a period of 48 months, the average monthly operating costs for a small business C (in dollars) is approximated by the model C=0.55t2+550 where t is the number of months. During which month was the average operating cost $1430?

17. Homework
Practice Sheet