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## Homework Statement

Find the intervals of all possible value of p which the equation equation: (p-1)x^2+4x+(p-4)=0 has two different roots.

## Homework Equations

ax^2+bx+c>0 ??

## The Attempt at a Solution

(p-1)x^2+4x+(p-4)>0 ??

How would I go about solving this?

Is two roots >0 or =0??

Could I have an example so that I could then solve the problem on my own or steps I need to take in order to solve for the values of p.