How do you determine the domain of f(x)=1x2−5x√4f(x)=1x2−5x4?

Answer 1

y = f(x) - x^2 - 5x^4

or

y = f(x) = x^2 - 5x*sqrt(4) = x^2 - 10x

it doesn't matter...

the function is a polynomial with domain ALL REALs