SOLUTION: given f(x)=2x^2-2x+1 and g(x)=x^3-4 find (f-g)(3)

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Question 977640: given f(x)=2x^2-2x+1 and g(x)=x^3-4 find (f-g)(3)
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
(f-g)(3) is the same as f(3) - g(3)

f(x) - g(x) = 2x^2-2x+1 - (x^3-4)
f(x) - g(x) = 2x^2-2x+1 - x^3+4
f(x) - g(x) = -x^3+2x^2-2x+5
f(3) - g(3) = -(3)^3+2(3)^2-2(3)+5 ... replace each x with 3
f(3) - g(3) = -10 ... use a calculator
(f-g)(3) = -10