SOLUTION: Evaluate -2x^4-3x²+5x-9forx=2

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Question 173086:
Evaluate
-2x^4-3x²+5x-9forx=2
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

-2x%5E4-3x%5E2%2B5x-9 Start with the given expression.


-2%282%29%5E4-3%282%29%5E2%2B5%282%29-9 Plug in x=2.


-2%2816%29-3%282%29%5E2%2B5%282%29-9 Raise 2 to the 4th power to get 16.


-2%2816%29-3%284%29%2B5%282%29-9 Square 2 to get 4.


-32-3%284%29%2B5%282%29-9 Multiply -2 and 16 to get -32.


-32-12%2B5%282%29-9 Multiply -3 and 4 to get -12.


-32-12%2B10-9 Multiply 5 and 2 to get 10.


-43 Combine like terms.



So -2x%5E4-3x%5E2%2B5x-9=-43 when x=2