Question

can anyone help me? f(x)= (x-2)2 Find f(2)

Answer 1

f(x) = (x-2)^2

To find f(2), everywhere you see x, replace it with 2, then evaluate:

f(2) = (2-2)^2
f(2) = (0)^2
f(2) = 0

Answer 2

I wrote the question wrong. f(x) = (x-2)^2 Find f(-2) Can you help me with that?

Answer 3

OK

f(x)=(x-2)^2

Now we are told to put the value -2 into the variable x and see what the function f(x) will give us when x=-2 .

so:

f(-2)=((-2)-2)^2
f(-2)=(-2-2)^2
f(-2)=(-4)^2
f(-2)=16

Answer 4

I am not very good with math. english is my strong subject. I am trying to comprehend what I am doing. The answer that I got was -6. I do not understand how I got that. The way that my teacher explains it to me is so very confusing.

Answer 5

It's good I always have fiddle around (wink wink) to trail me lol

Answer 6

Another question? f(x) = x^4 + 2x^2 - 1 Find f(2)

Answer 7

summer, first is this one - is it clear why for
f(x)=(x-2)^2
f(-2)=16
?

Answer 8

No, sadly it is not.

Answer 9

OK:
f(-2)=(-2-2)^2

so far so good ?

Answer 10

Yes!

Answer 11

ok.
how much is :
(-2-2)
?

Answer 12

-4?

Answer 13

yes. that's right.

nos how much is:
(-4)^2
?

Answer 14

16

Answer 15

correct.

Answer 16

how did you get 6 before ?

Answer 17

But u didnt do exponents first. I thought ur suppoose to do exponents first

Answer 18

nope :)

BEDMAS is an acronym that stands for;

B-brackets
E-exponents
DM-multiply or divide (left to right)
AS-add subtract (left to right)

http://mathcentral.uregina.ca/QQ/database/QQ.09.07/h/brit1.html

Answer 19

remember the word "BEDMAS" !!!!
the B tells you that first you need to handle the Brackets.

Answer 20

Ok what please excuse my dear aunt sally?

Answer 21

same thing :)
here the P stands for Paranthesis (another word for Brackets)

Answer 22

Also here the Paranthesis are handled first, only then the Exponents.

Answer 23

OK let me try another one of my problems. Do you have a few to wait and see if I get it correct?

Answer 24

sure.

Answer 25

Thank you SOOOOOOO much :)

Answer 26

f(x) =x^4 + 2x^2-1 f(2)

Answer 27

OK - go ahead and start, step by step

Answer 28

first - just rewrite it, and put "2" instead of every "x"

Answer 29

even better - put "(2)" instead of every "x"

Answer 30

done

Answer 31

post what you did

Answer 32

f(2) = (2)^4 + 2(2)^2-1

Answer 33

OK, now we have parantheses here, but they just have the number 2 in them - so we don't have anything more we need to do with them.

Next, we need to handle the exponents.
Can you do that now ?

Answer 34

16 and 4. Cuz (2)^4 = 16 and (2)^2 = 4

Answer 35

correct - so now write the whole equation with those values ^^^

Answer 36

16 + 4-1

Answer 37

16 + (2)4 - 1?

Answer 38

Almost, look:

f(2) = (2)^4 + 2*(2)^2-1
f(2) = 16 + 2*4 -1

Answer 39

yeah!!!

Answer 40

OK, so we did paranthesis , then we did exponents.
Next is multiplications and divisions.

Answer 41

23?

Answer 42

Write all the steps - it's a good drill to get it down ...

Answer 43

Continue from here:

f(2) = 16 + 2*4 -1

Answer 44

so now we are doing multiplication (there is no division)

Answer 45

16 + 8 -1= 23

Answer 46

yep

Answer 47

congrats!

Answer 48

Thanks! One more to make sure that I totally understand? I really really appreciate all the help!

Answer 49

of course the last thing you did were the final Additions and Subtractions

Answer 50

OK

Answer 51

YEAH!!

Answer 52

that's the spirit!

Answer 53

\[f(x)= 1/4x+2x Find f(8)\]

Answer 54

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