Question

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

Answer 1

\( f(x) = \sqrt{5 - x} \)
This is it, correct?

So, f(-6) means x = -6 in our function. Have you tried replacing x for -6 in the function?

Answer 2

yes and it comes as a decimal .. 3.316

Answer 3

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

Answer 4

it wants a radical

Answer 5

? i dont know how to do it

Answer 6

\( f(-6) = \sqrt{5 - (-6)} \)
\( = \sqrt{5 + 6} \)
\(= \sqrt{11} \) <--- 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.

Answer 7

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