SOLUTION: For the polynomial below, find F(4). F(x) = 2x^3 - x^2 - 4x + 9

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: For the polynomial below, find F(4). F(x) = 2x^3 - x^2 - 4x + 9      Log On


   

Question 144973: For the polynomial below, find F(4).
F(x) = 2x^3 - x^2 - 4x + 9
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

f%28x%29=2x%5E3-x%5E2-4x%2B9 Start with the given function


f%284%29=2%284%29%5E3-%284%29%5E2-4%284%29%2B9 Plug in x=4


f%284%29=2%2A64-4%5E2-4%2A4%2B9 Raise 4 to the 3rd power to get 64


f%284%29=128-4%5E2-4%2A4%2B9 Multiply 2 and 64 to get 128


f%284%29=128-16-4%2A4%2B9 Raise 4 to the 2nd power to get 16


f%284%29=112-4%2A4%2B9 Subtract 16 from 128 to get 112


f%284%29=112-16%2B9 Multiply 4 and 4 to get 16


f%284%29=96%2B9 Subtract 16 from 112 to get 96


f%284%29=105 Add 96 and 9 to get 105