Question

simplify f(x)= (2x^2+3x+1)
then using complete sentences explane why f(1)=2, f(0)=1, and f(-1)=0, yet f(-1/2) is undefined, please show work :)

Answer 1

do you know what we mean by "f(1)"

Answer 2

no

Answer 3

f(1) means:

"plug a 1 in for x"

Answer 4

what does that equation equal when we put a 1 in for x?

Answer 5

its over 2x+1 i forgot that

Answer 6

okay..

Answer 7

same notation applies

Answer 8

what does that equation equal when we plug a 1 in for x?

Answer 9

the x in f(x) is the plug in for all the x's i know

Answer 10

yes change all the x's for 1

Answer 11

then do easy math to come up with a number

Answer 12

i still cant simplify it

Answer 13

what do you have?

Answer 14

have what?

Answer 15

What equation are you having trouble simplifying?

Answer 16

the one in the questain next to the word simplify over the other numbers i said i forgot

Answer 17

did you plug in a 1 for x?

Answer 18

that wony simplify it -___-

Answer 19

did you try?

Answer 20

because i assure you it will

Answer 21

its 6 nut thats an answer not a simplify

Answer 22

remember its all over.. 2x+1

Answer 23

and when you plug a 1 in for x on the bottom part you get 3

Answer 24

6/3 is 2

Answer 25

which is why f(1) = 2 !!!

Answer 26

yah and...

Answer 27

that is the very first part of the question you posted and asked for help on

Answer 28

if you do the same for 0 you get 1

Answer 29

itds noy simplixied

Answer 30

the number "2" is as simple as it gets!

Answer 31

now the next part is to try and do that for -1/2

Answer 32

\[\large f(x) = \frac {2x^2+3x+1}{2x+1}\]
i'm just clarifying the function.... :)

Answer 33

sweet!

Answer 34

if you would like to finish the problem try and plug in -1/2 for x..

Answer 35

you wil find that you get 0 in the denominator

Answer 36

anything over 0 is undefined