1. 7.5a Solving Radical Equations

2. Radical Equations To solve a radical equation 1.Isolate the radical completely 2.Raise both sides to the power of the radical -this will undo the radical on the one side. To solve a radical equation 1.Isolate the radical completely 2.Raise both sides to the power of the radical -this will undo the radical on the one side.

3. The operation of raising both sides to a power Can sometimes introduce extraneous solutions So always plug answer back in to make sure it works! Remember: Evaluating an even root results in the positive value only.

4. 2) Solve and check for extraneous solutions

5. 3) check for extraneous solutions

6. 4) check for extraneous solutions

7. 5) Application The power P in watts that a circular solar cell produces and the radius of the cell in centimeters are related by the square root equation About how much power is produced by a cell with a radius of 10 cm?