SOLUTION: If f(x)=2x^2 -7x+3 find Part A f(2) Part B f(-3) I have tried to solve this by plugging the 2 in for x and for part A came up with -3 and for part B came up with 42. a

Question 128655: If f(x)=2x^2 -7x+3 find
Part A f(2)

Part B f(-3)
I have tried to solve this by plugging the 2 in for x and for part A came up with -3 and for part B came up with 42. am I doing this correctly
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
a)

Let's find f(2)

Start with the given function

Plug in

Raise 2 to the 2nd power to get 4

Multiply 2 and 4 to get 8

Multiply 7 and 2 to get 14

Subtract 14 from 8 to get -6

Add -6 and 3 to get -3

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

b)

Let's find f(-3)

Start with the given function

Plug in

Raise -3 to the 2nd power to get 9

Multiply 2 and 9 to get 18

Multiply 7 and -3 to get -21

Subtract -21 from 18 to get 39

Add 39 and 3 to get 42

So you are correct.
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