SOLUTION: 3 2 Given f(x) = �x � 2x + 3x � 9, find f(�2), f(0), and f(1). I have been trying to work this out but do not know if I am working it correctly. Thanks ( Idid

Question 123006: 3 2
Given f(x) = �x � 2x + 3x � 9, find f(�2), f(0), and f(1). I have been trying to work this out but do not know if I am working it correctly. Thanks
( Idid not know how to post it correctly but the three is supposed to be above the x and the 2 is supposed to be above the the y)
Found 2 solutions by checkley71, jim_thompson5910:
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
Sorry but i don't see any y in this equation.
If you're trying to show powers then use x^2 which is x*x or x squared.

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

Let's evaluate f(-2)

Start with the given function

Plug in

Raise -2 to the 3rd power to get -8

Negate -8 to get 8

Raise -2 to the 2nd power to get 4

Multiply 2 and 4 to get 8

Subtract 8 from 8 to get 0

Multiply 3 and -2 to get -6

Add 0 and -6 to get -6

Subtract 9 from -6 to get -15

----------------------------

Let's evaluate f(0)

Start with the given function

Plug in

Raise 0 to the 3rd power to get 0

Raise 0 to the 2nd power to get 0

Multiply 2 and 0 to get 0

Subtract 0 from 0 to get 0

Multiply 3 and 0 to get 0

Add 0 and 0 to get 0

Subtract 9 from 0 to get -9

----------------------------

Let's evaluate f(1)

Start with the given function

Plug in

Raise 1 to the 3rd power to get 1

Negate 1 to get -1

Raise 1 to the 2nd power to get 1

Multiply 2 and 1 to get 2

Subtract 2 from -1 to get -3

Multiply 3 and 1 to get 3

Add -3 and 3 to get 0

Subtract 9 from 0 to get -9

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