Question

Write a polynomial function in standard form with zeros at 2,-1, and 3.

Answer 1

A zero of 'a' corresponds to a factor of (x-a). Go!

Answer 2

? i dont get it

Answer 3

since 2 is a zero, (x-2) is a factor of polynomial

Answer 4

so you can write polynomial function as :
f(x) = (x-2)(x--1)(x-3)

Answer 5

multiply and put it in standard form : ax^3 + bx^2 + cx + d

Answer 6

i got x^3-6x^2+10x-6

Answer 7

@ganeshie8 is this correct^
???????

Answer 8

nope.
check wid
http://www.wolframalpha.com/input/?i=+%28x-2%29%28x--1%29%28x-3%29

Answer 9

i dont get how to do it tho

Answer 10

You were just shown the entire setup. Please look carefully at what is already written. Demonstrate your best efforts. So far, you have told us only that you don't get it. Please read carefully. Show your work. It's all right here.

Answer 11

oh...

Answer 12

i kinda dont get it cuz all im doing is multiplying

Answer 13

Pretty much it after you find the factors. Good work.

Answer 14

? i got x^3-6x^2+7x+6

Answer 15

Is that right?

Answer 16

idk im asking u

Answer 17

If I say "yes" or "no", will it help at all? You need to gain the confidence to tell me it is right. Is it.

There were three linear factors. Did it come out x^3? That would be a good sign.
The constant terms are -2, +1, -3. Did the final constant term come out +6? That would be a good sign.

Answer 18

ok

Answer 19

In this case, despite those two easy checks, the other two are no good. Please try again. Do the first two binomials and show me what you get.

Answer 20

x^2-3x-2

Answer 21

There's your problem. -3 is not correct. Please try again.

Answer 22

x^2-x-2

Answer 23

That's better. Now introduce the 3rd factor.

(x^2 - x - 2)(x-3) = ??

Answer 24

x^3-4x^2-x+6

Answer 25

So close! -2x + 3x = +1x

Answer 26

oh oops thanks can u help me with some more please questions

Answer 27

If you're done with this one, please close it and start a new thread.