Question 86861: f(x) = xsquared - x - 2 if f = 0,-2,1 I think i have to put the o and -2 and 1 where the x is and then do the equation but when I have a -2 and i subsitute it where their is a minus x then do I add the 2
Answer by Nate(3500)   (Show Source):
You can put this solution on YOUR website! If you get caught up in all the sign changes, I advise to use paranthesis.
f(x) = x^2 - x - 2
f(x) = (x)^2 - (x) - 2
~
If: f(x) = 0,-2,1
0 = (x)^2 - (x) - 2
-2 = (x)^2 - (x) - 2
1 = (x)^2 - (x) - 2
~
If: x = 0,-2,1
f(0) = (0)^2 - (0) - 2 = -2
f(-2) = (-2)^2 - (-2) - 2 = 4 + 4 - 2 = 6
f(1) = (1)^2 - (1) - 2 = 1 - 1 - 2 = -2
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