Here's the question you clicked on:
ExtremeAnon
-4√(x+9)=20
\[\LARGE -4\sqrt{x+9} = 20\]
Divide both sides by -4 to get the radical containing x by itself.
Then ask yourself can you ever have the square root of something have a negative output?
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...
@pkjha3105 ? Any help please?
Hi ^_^ are we trying to fine x?
x ll hve imaginary value.....there is no real sol. of x..
that was i was thinking that why i was asking!
Yes trying to find X & so there's no solution? Why?
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!