SOLUTION: find the x and y intercepts of the function f(x)= x to the third - 9x

Algebra ->  Coordinate-system -> SOLUTION: find the x and y intercepts of the function f(x)= x to the third - 9x      Log On


   

Question 204988: find the x and y intercepts of the function f(x)= x to the third - 9x
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
find the x and y intercepts of the function f(x)= x to the third - 9x
---
y = x^3 - 9x
----------------
y-intercept:
Let x = 0, then y = 0 (this is the y-intercept)
---------------------------------
Let y = 0, then x(x^2-9)=0
x = 0 or x = 3 or x = -3
-----------------------------------------
Cheers,
Stan H.