Question

What is the output of the given input
f(x) = -x^2-x, find f(-4)

Answer 1

just plug in -4 into everywhere where there is an x

Answer 2

so solve -4^2 - 4 = ?

Answer 3

F(x) = 12?

Answer 4

careful here

Answer 5

dude you are top dog man

Answer 6

\(-x^2\) means to square \(x\) and then put a minus sign in front

Answer 7

So -4

Answer 8

oh yeah so its +4

Answer 9

\[f(x) = -x^2-x\]
\[f(-4)=-(-4)^2-(-4)\]

Answer 10

I mean -2

Answer 11

good call satellite

Answer 12

be very careful, you have not posted the correct answer yet

Answer 13

\[f(-4)=-(-4)^2-(-4)=-(-4)(-4)+4=-16+4=...\]\]

Answer 14

Hmmmm, f(x)= 20

Answer 15

@satellite73

Answer 16

\(-16+4=4-16\neq 20\)

Answer 17

-12= -12 = 20 ?

Answer 18

@Chlorophyll

Answer 19

f ( -4 ) = - ( -4)² - ( -4)
= - 16 + 4 = ...?

Answer 20

-12

Answer 21

Thanks so much :)

Answer 22

Just plug in exactly the way I show you, so you won't miss the sign :)

Answer 23

Thanks, I will next time