Question

Consider the function f(x) = 8 − 3x2. Find the value of f(x) when x = 3 and select the correct answer below.

-19
-10
26
35

Answer 1

the answer is 30

Answer 2

but there is no 30 in the options

Answer 3

okay let me try it again

Answer 4

ok thank you

Answer 5

ok thank you

Answer 6

its -10

Answer 7

8-3(3)x2
8-9x2
8-18
-10

Answer 8

is it
\[ f(x) = 8 − 3x^2 \]?
if so , the \(x^2\) means x times itself. in other words, you can write it this way
\[ f(x) = 8 − 3\cdot x \cdot x \]

to find f(3) you erase the x wherever you see it, and replace it with 3
then simplify (and remember "order of operations"... multiply before add)