Question

Which of the graphs below represent the function f(x) = − x3 + 4x2 − x + 3? You may sketch the graph to compare.

graph going through x axis at 3.5, Passes through y axis at 0.
graph going through x axis at negative 4.5. Passes through y axis at 0.
graph going through x axis at negative 4.5. Passes through y axis at 3.
graph going through x axis just before 4. Passes through y axis at 3.

Answer 1

graph should go through the x axis at 4...im pretty sure... but do you know why?

Answer 2

\[(x-4) (x^2 - 6) \]
if you factored the equation it would equal this

Answer 3

equal each side to 0

Answer 4

You're thinking letter choice "D"?

Answer 5

\[x-4 = 0\] equation
\[x = 4\] when you add 4 to both sides

Answer 6

yes

Answer 7

Alrighty, i willl let you know if youre correct :) thank you

Answer 8

Yes! it was correct!! :) thank you so very much!

Answer 9

no problem :)

Answer 10

do you know why it was correct?

Answer 11

Yes i figured it out :) once i get the answer, i work my way backwards, but you gave great pointers for my understanding!

Answer 12

no problem :)