Lesson 7-6 Solving Radical Equations

1
Lesson 7-6Solving Radical Equations

• Objectives
• Students will
• Solve radical equations
• Solve word problems involving radicals

2
Eliminative Radicals in Equations ? square
both sides ? cube both sides

• Steps
• Isolate the radical (treat as variable)
• Square (cube) both sides
• Simplify
• Check for extraneous roots (dont work)

3
Example 1 Solve
( )2 ( )2
Check
4
Example 2 Solve
yes
No extraneous
5
Example 3 Solve
6
Ex 4
7
Ex 5
8
Assignment

• 7-6/318-319/4-40 m4, 41,42,54-57