x equals the square root of 8 x

Question

watchmath · Answer

$x=\sqrt{8x}$\
Square both sides
$x^2=8x$
$x^2-8x=0$
$x(x-8)=0$
$x=0,8$

anonymous · Answer

X^x = 8x
X = 8

anonymous · Answer

Sorry that's x^2 = 8x
X = 8

anonymous · Answer

um watch math can you do it if it has an equation on both sides or is it different

anonymous · Answer

See if x^2 = 8x then 
X*x = 8*x
Divide both sides by x
X=8

watchmath · Answer

In this problem we need to bring everything to one side of the equation so that we can factor it. Otherwise if you divide by $x$ like ishwan did you will loose one solution, namely $x=0$.

anonymous · Answer

an example is n-4= the spuare root of 12-3n

watchmath · Answer

The idea is still the same. You square both sides and collect everything on one side.
$(n-4)^2=12-3n$
$n^2-8n+16=12-3n$
$n^2-5n+4=0$
$(n-4)(n-1)=0$
$n=4$ or $n=1$
Double check to the original equation shows that $n=1$ is not a solution.
Thus $n=4$ is the only solution.
(press good answer button if my answer is helpful :D )

anonymous · Answer

Watch math is correct

anonymous · Answer

alright thanks i need help with one more the square root of b-1-b=negative seven

watchmath · Answer

Post as a new question :)

anonymous · Answer

the square root of b-1-b equals negative seven

anonymous · Answer

shawna can paint a fence in 5 hrs. Jassie can paint the same fence in  10 hrs. how long will it take them to paint the fence together