1. 7.5 Solving Radical Equations Objective: Be able to solve square root equations and other radical equations

2. Definitions A radical equation is an equation that has a variable in a radicand (or a variable with a fractional exponent). Steps to solving a radical equation: 1)Isolate the radical on one side of the equation. 2)Raise both sides of the equation to the same power. 3)Check your solution(s). Some may be extraneous.

3. Solving - *check for extraneous solutions

4. CHECK!!

5. Solving - *check for extraneous solutions

6. CHECK!!

7. Solving - *check for extraneous solutions

8. CHECK!!

9. Solving - *check for extraneous solutions Ex4) Solve

10. Solving - *check for extraneous solutions CHECK!!

11. Solving - *check for extraneous solutions Ex5) Solve

12. Solving - *check for extraneous solutions CHECK!!

13. Solving - *check for extraneous solutions PRACTICE!!

14. Solving - *check for extraneous solutions PRACTICE!!

15. 6) The volume V of a sphere and its radius r are related by the following cube root equation. What is the volume of a sphere with a radius of 6 cm? Solving - *check for extraneous solutions

16. Homework #11 www.phschool.comwww.phschool.com  web code: age-0705 WATCH These Videos: #2. Solving radical equations with rational exponents #3. Solving radical equations and checking for extraneous solutions #4. Solving equations with two rational exponents DO These Problems: Pg 394 #1, 5, 7, 9, 11, 18, 20, 21, 27