- #1
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Homework Statement
[itex]
x^4 + 3x^3 - 7x^2 - 15x + 18 = 0
[/itex]
Find x
Homework Equations
First Derivative?
Second Derivative?
The Attempt at a Solution
Normally, I'd use Ferrari's method to tackle this problem but I am required to use derivation to find the answer...
Where do I go from here? Do I use first derivative to find critical points? second derivative for concavity? I'm not sure what those will be helpful for though..