SOLUTION: Given f(x) = x2 + x – 2, find f(0) Given f(x) = 2x – 1, find f(4)

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Question 112290: Given f(x) = x2 + x – 2, find f(0)
Given f(x) = 2x – 1, find f(4)
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
#1

f%28x%29=x%5E2%2Bx-2 Start with the given function.


f%280%29=%280%29%5E2%2B0-2 Plug in x=0. In other words, replace each x with 0.


f%280%29=%280%29%2B0-2 Evaluate %280%29%5E2 to get 0.


f%280%29=-2 Now combine like terms


#2
f%28x%29=2x-1 Start with the given function.


f%284%29=2%284%29-1 Plug in x=4. In other words, replace each x with 4.


f%284%29=%2B8-1 Multiply 2 and 4 to get 8


f%284%29=7 Now combine like terms