SOLUTION: What is the value of f(-3). The equation is f(-3)?f(x) = 2x second power+ 5x-9

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Question 568428: What is the value of f(-3). The equation is f(-3)?f(x) = 2x second power+ 5x-9
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29+=+2x%5E2%2B5x-9 Start with the given function


f%28-3%29+=+2%28-3%29%5E2%2B5%28-3%29-9 Plug in x=-3 (ie replace every x with -3)


f%28-3%29+=+2%289%29%2B5%28-3%29-9 Square -3 to get 9


f%28-3%29+=+18-15-9 Multiply


f%28-3%29+=+-6 Combine like terms


So the answer is f%28-3%29+=+-6
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