SOLUTION: Evaluate each function for the value specified 3. f (x) = -2x^3 + 5x^2 - x - 1; find (a) f (-1), (b) f (0), and (c) f (2).

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Question 124404: Evaluate each function for the value specified
3. f (x) = -2x^3 + 5x^2 - x - 1; find

(a) f (-1), (b) f (0), and (c) f (2).

Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!
a)

Let's evaluate


Start with the given function.


Plug in . In other words, replace each x with -1.


Evaluate to get -1.


Evaluate to get 1.


Multiply -2 and -1 to get 2


Multiply 5 and 1 to get 5


Multiply -1 and -1 to get 1


Now combine like terms


-----------Now let's evaluate another value---------

b)

Let's evaluate


Start with the given function.


Plug in . In other words, replace each x with 0.


Evaluate to get 0.


Evaluate to get 0.


Multiply -2 and 0 to get 0


Multiply 5 and 0 to get 0


Multiply -1 and 0 to get 0


Now combine like terms


-----------Now let's evaluate another value---------

c)

Let's evaluate


Start with the given function.


Plug in . In other words, replace each x with 2.


Evaluate to get 8.


Evaluate to get 4.


Multiply -2 and 8 to get -16


Multiply 5 and 4 to get 20


Multiply -1 and 2 to get -2


Now combine like terms

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