Solve the equation. Check both solutions and only write the real solution(s). v2x + 3 = x
*v stands for sqrt

A. {-1}
B. {3}
C. {-1, 3}

Question

Solve the equation. Check both solutions and only write the real solution(s). v2x + 3 = x 
*v stands for sqrt 

	A.	{-1}
	B.	{3}
	C.	{-1, 3}

anonymous · Answer

I think B.

eyust707 · Answer

i think so too! negitive square roots are not real.

anonymous · Answer

I can't really tell what's going on the way you have the math written.  Is it:
$$\sqrt{2}x+3=x$$
$$\sqrt{2x}+3=x$$
or
$$\sqrt{2x+3}=x$$

eyust707 · Answer

thats a good point because 3 isnt actually a solution the way u wrote it

anonymous · Answer

@TheFigure the last one you wrote is how it looks

anonymous · Answer

Alright - this one.  $$\sqrt{2x+3}=x$$

anonymous · Answer

First, I'd square both sides to get the x out from under that square root:$$\sqrt{2x+3}^2=x^2$$Then, I'd recognize that it is quadratic and move everything to one side.
$$0=x^2-2x+3$$From here, you can either use the quadratic formula or factor (depending on where you are in your math class).

anonymous · Answer

Yikes - I blew it!  Let's try that again...  It should be:$$0=x^2-2x-3$$

anonymous · Answer

Now it factors:
$$0=x^2-2x-3$$
$$0=(x-3)(x+1)$$
x=-1, 3