Question

f(x) = -3x^2-4x+5

f(0) & f(2)

Help! I am seriously LOST!

Answer 1

hey, how's it going?

Answer 2

its not lol I am so lost on this it is not even funny!

Answer 3

what is exactly is the question asking?

Answer 4

i have no idea I am given what is typed above with the statement at the begining of the assignment that say simplify or solve...

Answer 5

so does it seem like they want you to find what f(0) and f(2) are?

Answer 6

that would be my guess

Answer 7

are you familiar with what a function is?

Answer 8

i probably would be but this is my first math class in almost 9 years

Answer 9

basically a function is a machine that you feed an x-value, and it spits out a y-value

Answer 10

so whatever number you put into the function machine, it does what it does and you get some output

Answer 11

anyways, it is asking you to feed 0 and 2 into the function and see what comes out. so you need to plug those values in for x and compute the result

Answer 12

so instead of it saying -3x^2 I should put the 0 where that x is so it would read (3)(0)^2 ???

Answer 13

right, to find f(0), put a 0 wherever you see an x and keep everything else the same

Answer 14

so my answers would be 5 and 33?

Answer 15

5 looks right, but how did you get 33?

Answer 16

\[(-3(2))^{2} -4(2) +5\]

Answer 17

are those outer parentheses in the first part in the original equation, or did you add them?

Answer 18

I added them

Answer 19

with a question like this you need to make sure to just plug in the number to the exact equation and not change it in any way. do you see why the extra parentheses make a difference?

Answer 20

i have to go in a second, but the -3 shouldn't be squared, the exponent only applies to x