SOLUTION: Given F(X) = 4X^2 - 12X, solve f(X) > 0.

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Question 99676: Given F(X) = 4X^2 - 12X, solve f(X) > 0.
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
4x^2-12x>0
factor: 4x(x-3)>0
4x>0...x>0
x>3
Test point method find a value of f(x) below 0, between 0 and 3, and above 3:
f(-1)=16
f(1)=-8
f(4)=16
f(x)>0 when x<0 or x>3
the graph tells all.
Ed
graph%28500%2C500%2C-10%2C10%2C-10%2C10%2C4x%5E2-12x%29