f(-6)=???? f(x)=square root of 5-x

Question

f(-6)=????      f(x)=square root of 5-x

accessdenied · Answer

$ f(x) = \sqrt{5 - x} $
This is it, correct?

So, f(-6) means x = -6 in our function.  Have you tried replacing x for -6 in the function?

anonymous · Answer

yes and it comes as a decimal .. 3.316

accessdenied · Answer

Hmm, that seems about right.  I might leave it with the radical, myself, depending on if the question asks us to round or not.  :)

anonymous · Answer

it wants a radical

anonymous · Answer

? i dont know how to do it

accessdenied · Answer

$ f(-6) = \sqrt{5 - (-6)} $
          $ = \sqrt{5 + 6} $
          $= \sqrt{11} $        <--- this is the radical, I think I'd leave it there if you're not asked to round
          $ \approx 3.316$   <--- this is your answer, which is the same.

accessdenied · Answer

$\sqrt{11}$ is just a little more "accurate".  :)