Question

For the function f(x) = -15x^4 +12, what is the value of f(x) when x=-2?
F. -228
G. -108
H. 132
J. 252

Answer 1

\(\large\color{blue}{ \bf f(x) = -15x^4 +12 }\) just giving couple examples.


\(\large\color{blue}{ \bf f(3) = -15(3)^4 +12=-15(81)+12=-1215+12=1203 }\)

\(\large\color{blue}{ \bf f(-1) = -15(-1)^4 +12=-15(1)+12=15+12=27 }\)

\(\large\color{blue}{ \bf f(-2) = ~~you~~~~tell~~~~me. }\)

Answer 2

I know how to do it it's just that I don't have a calculator can you please give me the answer

Answer 3

\[(-2)^4=16,~~~~~~~~~~~~(-15)(16)=-240.\]

Answer 4

-240x=-24