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for some reason it keeps telling me my answer is wrong please help.

I am also having the same problem with this one. My answer was
[tex] \frac{4x \sqrt{x} + \sqrt{x} }{x} [/tex]
however it keeps telling me I'm wrong.
the question was to combine into one answer:
[tex]4 \sqrt{x} + \frac{1}{ \sqrt{x} } [/tex]

for some reason it keeps telling me my answer is wrong please help I am also having the same problem with this one My answer was tex frac4x sqrtx sqrtx x texhow class=