A little precal help please!!!!?

Question

Ok here is the equation that im having trouble understanding

F(x) = 8x ²- √-3x

F(-8)

Im lost I keep getting a very high value, instead of something close to the given answers.

Answer 1

F(-8) =8(-8)^2 -sqrt(-3(-8))

=512 -sqrt 24 =507.10

You probably were multiplying first then squaring (64^2) which is contrary to the order of operations.

exponents precede multiplication

Answer 2

It is a high value since -8 squared is 64 then that times 8 is 512 minus sqrt 24

So it's 512 - √24

Answer 3

F(-8) = 8(-8)(-8) - sqrt((-3)(-8))

F(-8) = 512 - sqrt(24)

F(-8) = 512 - 4.899

F(-8) = 507.101

This seems like a perfectly reasonable solution to me, but I don't know what your definition of "a very high value" is.