x+30=x under a square root

Question

nory · Answer

What's under the square root? Do you mean  $$\sqrt{x+30} = x$$ or $$x + 30 = \sqrt{x}$$ or what?

anonymous · Answer

the first one you just said

espex · Answer

How far have you gotten in your attempt to solve?

anonymous · Answer

no where

espex · Answer

Your first step is going to look at how you can get rid of the radical.

anonymous · Answer

I'm not sure how to do it. That's why I'm here.

espex · Answer

Start by looking at your left side, to get rid of your square root, you must square it, and what you do to one side, you must do to the other.

strawberry17 · Answer

Like this:

$$(\sqrt{x + 30})^{2} = (x)^{2}$$

Then when you square both sides, you can take away the square root of the left side and you are left with:

x + 30 = x^2

strawberry17 · Answer

I mean take away the radical on the left side..

nory · Answer

Now you can solve the equation that @strawberry17 gave you by putting all the terms on one side, and because it's a quadratic equation, you can now easily solve it.

nory · Answer

Don't forget to plug in your solutions when you're done so that you make sure they work out in the original equation. Always important, especially with radical equations.

nory · Answer

No. Your equations were correct. I am telling WoozySlick how to finish up the equation.