SOLUTION: -2x^4-3x^2+5x-9 when x=2

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Question 151598: -2x^4-3x^2+5x-9 when x=2
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

-2%2Ax%5E4-3%2Ax%5E2%2B5%2Ax-9 Start with the given expression.


-2%2A%282%29%5E4-3%2A%282%29%5E2%2B5%2A2-9 Plug in x=2


-2%2A16-3%2A%282%29%5E2%2B5%2A2-9 Raise 2 to the 4th power to get 16.


-2%2A16-3%2A4%2B5%2A2-9 Square 2 to get 4.


-32-3%2A4%2B5%2A2-9 Multiply -2 and 16 to get -32.


-32-12%2B5%2A2-9 Multiply 3 and 4 to get 12.


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


-44%2B10-9 Subtract 12 from -32 to get -44.


-34-9 Add -44 and 10 to get -34.


-43 Subtract 9 from -34 to get -43.


So -2%2A%282%29%5E4-3%2A%282%29%5E2%2B5%2A2-9=-43


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Answer:


So -2%2Ax%5E4-3%2Ax%5E2%2B5%2Ax-9=-43 when x=2