SOLUTION: Please help me solve this equation. find f(1) for f(x)=2x^3-3x^2+x-21

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Question 202957: Please help me solve this equation.
find f(1) for f(x)=2x^3-3x^2+x-21
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Note: we're not solving the equation, we're simply plugging in a value for "x" and evaluating.


f%28x%29=2x%5E3-3x%5E2%2Bx-21 Start with the given equation.


f%281%29=2%28red%281%29%29%5E3-3%28red%281%29%29%5E2%2Bred%281%29-21 Plug in x=1.


f%281%29=2%28red%281%29%29-3%281%29%5E2%2B1-21 Cube 1 to get 1.


f%281%29=2%281%29-3%28red%281%29%29%2B1-21 Square 1 to get 1.


f%281%29=red%282%29-3%281%29%2B1-21 Multiply 2 and 1 to get 2.


f%281%29=2-red%283%29%2B1-21 Multiply -3 and 1 to get -3.


f%281%29=red%28-21%29 Combine like terms.


So the answer is f%281%29=-21