Question

Write a polynomial function with given zeros
x=-2,1,4

Answer 1

start with \[(x+2)(x-1)(x-4)\] and then multiply out

Answer 2

how do I multiply out?

Answer 3

if \(-\)2 is a zero, then one factor is \(x-(-2)=x+2 \) etc

Answer 4

idk, if it was me i would use technology so i don't screw up

Answer 5

but you can do it by hand if you like
first multiply \[(x+2)(x-1)\] the usual way, when you get done with that, multiply the result by \(x-4\)

Answer 6

wanna cheat?

Answer 7

I wanna know how to do but have the answer to check myself..

Answer 8

http://www.wolframalpha.com/input/?i=%28x%2B2%29%28x-1%29%28x-4%29

Answer 9

do you know how to multiply this out? the usual four multiplication \[(x+2)(x-1)\]?

Answer 10

No.

Answer 11

Whats the answer so I can chcek myself..