Question

If f(x) = x2 - x + 2, then find the value for f(-3).

Answer 1

plug in "-3" for your "x" values. that's what it pretty much means. Your finding what the function equals to when "x=-3"

Answer 2

Sorry But I need Show All of my work to get my grade

Answer 3

Okay. Show your work here then. I'll tell you if you did it right or not. Then just copy what you did here onto your paper.

Answer 4

No i mean I need The answer with all the steps

Answer 5

I'm not going to give you the answer without you putting out some work so you can learn also.

Answer 6

Not whats done here. We help solve the problem so you learn how to do it. He told you how it is done plug in -3 for all your X values and solve. We will let you know if you are right.

Answer 7

Open Study is the name of the site, not Open Answers

Answer 8

okay

Answer 9

f(-3)=-3 2 -3+2

Answer 10

Is this correct^^^^^????

Answer 11

No. Pay attention to your addition and subtractions. You're plugging in a negative 3 not just a regular positive 3. so add them in using parenthesis to make it more clear for you to see.

Use the "^" carrot to express exponents.

Answer 12

for example, say my x = - 4 then my equation would look as so:
\[ f(-4) = (-4)^2 - (-4)3 + 2\]

Answer 13

okay

Answer 14

thank you

Answer 15

\[f(-3) = (-3)^2-(-3)+2\]

Answer 16

f(-3)=(-3)^2-(-3)3+2 Like This???

Answer 17

correct

Answer 18

remove the 3 after -(-3)

Answer 19

now solve it, and you will have your answer. Be careful of the signs. Post answer when done here and someone will make sure you are correct

Answer 20

I can't solve it I don't know why ??? just can't And if I don''t solve this and 2 more uestions I will be kicked out plzz tell me plzz

Answer 21

where are you stuck?

Answer 22

I don't even know where to start?

Answer 23

You're just adding, subtracting, mutpliying, and taking a constant to the 2nd power. Are you telling us that you don't know how to do that?

Answer 24

If so, let's start by going term by term.

Answer 25

I think The answer is 6 but I 'm not sure

Answer 26

Okay. well lets start off with the first term:
\[(-3)^2\] what does this mean? do you know?

Answer 27

I think we need to multiply -3 times 2

Answer 28

No. When you see a smaller script that is above a number or letter, that means we times that number or letter by it self by the amount that is displayed, for example, say I have:\[(-2)^2\] it pretty much means\[(-2) \times (-2)\] or if I have, \[(-4)^2\] it means:\[(-4) \times (-4)\] or if the top number is actually 3 instead of 2:\[(-4)^3\] it means:\[(-4) \times (-4) \times (-4)\] do you understand so far?

Answer 29

okay yes i understand this

Answer 30

okay, then what does \[(-3)^2\]equal to?

Answer 31

9

Answer 32

Correct! We solved the first term, now we're subtracting a -3 as so:
\[9-(-3)\] what does that equal to?

Answer 33

12

Answer 34

Yes!

Answer 35

now we're adding a positive 2 for the last and final term

\[12 +2\]

Answer 36

what does that equal to?

Answer 37

14

Answer 38

is 14 correct??

Answer 39

YUP YUP! You have just solve each term one by one and have found the answer to your solution. Look at your original equation here:\[f(−3)=(−3)^2−(−3)+2\] you solve the first term so as so:
\[f(−3)=9−(−3)+2\]then you solved the next term as so:\[f(−3)=12+2\] then you added the last term\[f(−3)=14\]

Answer 40

Thank Yuo very much

Answer 41

You're welcome. Hopefully you have learned that if you get stuck in this type of equation again. Solve them one by one and take your time until you get it so you can do it faster next time.