Radical Equations and Extraneous Roots

Question 2 of 3 • NC-Math 2 CR

Did your explanation include the following?

Answer

I do not agree with the student because there is no real solution.

Solving the equation only gives possible solutions, but you must check them in the original equation.

Checking the solution in the original equation shows that 4 is an extraneous solution.

Radical Equations and Extraneous Roots

Radical Equations and Extraneous Roots

Radical Equations and Extraneous Roots