## ExtremeAnon -4√(x+9)=20 one year ago one year ago

1. ExtremeAnon

$\LARGE -4\sqrt{x+9} = 20$

2. ExtremeAnon

3. myininaya

Divide both sides by -4 to get the radical containing x by itself.

4. myininaya

Then ask yourself can you ever have the square root of something have a negative output?

5. ExtremeAnon

I don't know what I would get if I did that because I don't know how to divide with a square root or anything like that...

6. ExtremeAnon

7. Fools101

Hi ^_^ are we trying to fine x?

8. robert1

no soluction

9. pkjha3105

x ll hve imaginary value.....there is no real sol. of x..

10. Fools101

that was i was thinking that why i was asking!

11. ExtremeAnon

Yes trying to find X & so there's no solution? Why?

12. Fools101

So let's say you have an equation that's 2x=2x. Of course that one is obvious. When you divide by x (you're not supposed to do that because you lose a 0), you get 2=2, which means all solutions work. A little less obvious is 64x=(4^2)*4x. That will also get you 64=64 or x=x depending on which way you divide. This also means all solutions. I think!