Question

what is the value of f(x) when x=-3?
f(x)=2x^2+4x+10
a.-14
b.-8
c.16
d.34

Answer 1

\[\Large f(\color{royalblue}{x})=2(\color{royalblue}{x})^2+4(\color{royalblue}{x})+10\]

Answer 2

\[\Large f(\color{royalblue}{-3})=2(\color{royalblue}{-3})^2+4(\color{royalblue}{-3})+10\]

Answer 3

Understand how function notation works? :o
We replace the x's with -3's.

Need help simplifying it?

Answer 4

i get -56 everytime. but its not an answer choice.

Answer 5

Squaring the first term gives us,\[\Large f(\color{royalblue}{-3})=2(9)+4(\color{royalblue}{-3})+10\]Did you remember to square the negative? :)

Answer 6

ok i see what i did wrong thank you

Answer 7

cool

Answer 8

can you help me with 1 more
?

Answer 9

sure