- #1
lioric
- 306
- 20
Homework Statement
How do I find the value of n?
Homework Equations
I know that when it crosses x-axis y = 0
X3 - X2 - 20 =0
But don't know how to solve it from here
The Attempt at a Solution
The marking scheme says 3.0 or 3.1
I couldn't get the answer even by substituting
I know I'm doing something stupid