Question

PLEASE HELP! METAL.
Find a cubic function with the given zeros.

Square root of seven., -Square root of seven., -4

f(x) = x3 + 4x2+ 7x - 28
f(x) = x3 + 4x2 - 7x - 28
f(x) = x3 - 4x2 - 7x - 28
f(x) = x3 + 4x2 - 7x + 28

Answer 1

\[(x+\sqrt7)(x-\sqrt7)=x^2-7\]

Answer 2

\[\sqrt{7},-\sqrt{7},- 4\]

Answer 3

multiply that happiness by \((x+4)\) and you will have your answer

Answer 4

yes.

Answer 5

i.e.
\[(x+\sqrt7)(x-\sqrt7)(x+4)\] has the zeros you want
then
\[(x^2-7)(x+4)\] is all that is left to do

Answer 6

if you are nervous about not getting the right answer use technology
but it should not be too hard to do that multiplication

Answer 7

http://www.wolframalpha.com/input/?i=%28x^2-7%29%28x%2B4%29

Answer 8

f(x) = x3 + 4x2 - 7x - 28?

Answer 9

yup

Answer 10

Lol, thanks.

Answer 11

yw
say hi to johnny for me

Answer 12

Ok.

Answer 13

how do you know johnny, that's my BF.