SOLUTION: polynomial graphing f(x) = 2x^3-x^2-8x+4 Please help

Question 22476: polynomial graphing
f(x) = 2x^3-x^2-8x+4

Please help
Answer by rapaljer(4671) (Show Source): You can put this solution on YOUR website!

Begin by factoring by grouping:

Take out the common factor of (2x-1):

Factor the difference of squares:

The roots (or zeros, or x-intercepts) of this function are at
x=1/2, x= 2, x=-2.

Because the highest power of x in this function is to the third power (the degree of the polynomial is odd), this graph will open up on the right side, and down on the left side.

Using a graphing calculator, it looks like this:

R^2 at SCC
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