Question

When solving a radical equation, John and Tim came to two different conclusions. John found a solution, while Tim's solution did not work in the equation.

Will medal and fan
Create and justify two situations: one situation where John is correct and a separate situation where Tim is correct.

Answer 1

Haha, this is an interesting way to expose the common mistake of separating addition done underneath the radical (I believe this is what the teacher is going for). Simply create one solution where there is addition within a radical sign, and have John do the addition prior to taking the square root. Make time separate the radical (which is the error) and then take square roots.