SOLUTION: Please help me to solve the following: Solve and put answer into interval notation... −4x^3 + 55x^2 − 207x + 126 > 0 Thank you!!!

Algebra ->  Inequalities -> SOLUTION: Please help me to solve the following: Solve and put answer into interval notation... −4x^3 + 55x^2 − 207x + 126 > 0 Thank you!!!      Log On


   

Question 1003611: Please help me to solve the following:
Solve and put answer into interval notation...
−4x^3 + 55x^2 − 207x + 126 > 0
Thank you!!!
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Please help me to solve the following:
Solve and put answer into interval notation...
−4x^3 + 55x^2 − 207x + 126 > 0
------
I graphed it and found Real roots at x = 3/4, x = 6 and x = 7
and x = 7
------
graph%28400%2C400%2C-10%2C10%2C-10%2C10%2C-4x%5E3%2B55x%5E2-207x%2B126%29
--------
The graph is above the x-axis in the interval (-oo,3/4)U(6,7)
Cheers
-----