Question

what is an extraneous solution, and how do you deterine if a solution is extraneous?

Answer 1

Extraneous solution is something introduced while searching for your answer. It occurs often when you square an equation. For example
3x3=9
If I were to square 9 I would get + or - 3, but only +3 was in my original equation.
This happens often in solving trig equations.

Answer 2

If I were to take square root of 9, I meant to say.

Answer 3

thank you!