SOLUTION: How many positive real solutions are there in: f(x) = -2x^4 + 3x^3 + 7x^2 + 2 a. 0 b. 2 c. 1 d. None, there is no x-term

Algebra ->  Equations -> SOLUTION: How many positive real solutions are there in: f(x) = -2x^4 + 3x^3 + 7x^2 + 2 a. 0 b. 2 c. 1 d. None, there is no x-term      Log On


   

Question 144221: How many positive real solutions are there in:
f(x) = -2x^4 + 3x^3 + 7x^2 + 2
a. 0
b. 2
c. 1
d. None, there is no x-term
Answer by HyperBrain(694) About Me  (Show Source):
You can put this solution on YOUR website!
the easiest way to solve this is by calculators or graphing!
GRAPH:
graph%281000%2C1000%2C-20%2C20%2C-20%2C20%2C-2x%5E4+%2B+3x%5E3+%2B+7x%5E2+%2B+2+%29
As you can see, the graph intersects the x-axis at two points. Therefore, there are two positive real roots.
Power up,
HyperBrain!