How do you solve #sqrt(x+2)-x=0#?
1 Answer
Jun 17, 2018
Explanation:
Rearrange to get the square root on one side on its own:
Square it out to get a quadratic:
Quadratic formula:
But when we square in our working we need to check that we haven't accidentally introduced extra roots. In this case we have: -1 is not a solution of the original equation, although 2 is.
So there is one solution: