Question 451820: findall the real zeros of the function
f(x)=x^3-3x^2-x+3
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! findall the real zeros of the function
f(x)=x^3-3x^2-x+3
---
The sum of the coefficients is zero, so x = 1 is a root.
----
1)....1....-3....-1....3
.......1.....-2....-3...|..0
----
Quotient: x^2-2x-3
------
Factor:
(x-3)(x+1) = 0
x = 3 or x = -1
===================
Final Answer:
x = 1, x = -1, x = 3
========================
Cheers,
Stan H.
===============
|
|
|
