How do you solve #sqrt(2x+7)=x+3#?
Do a little squaring and quadratic-equation solving to get
The first thing you want to do in radical equations is get the radical on one side of the equation. Today is our lucky day, because that has already been done for us.
Next step is to square both sides to get rid of the radical:
Now we have to combine like terms and set the equation equal to
Unfortunately, this quadratic equation does not factor, so we'll have to use the quadratic formula:
We have our solutions:
As you can see, only one of our solutions work: