Question 188344
Ok, I have tried to solve this equation : 
Find f(a+2) for the function f(x)=3x^2-x+2 
and I keep getting 3a^2-a+4, can someone please show me how to solve this equation? 
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Sub a+2 for x
f(a+2) = 3(a+2)^2 - (a+2) + 2
= 3a^2 + 12a + 12 -a-2 + 2
= 3a^2 + 11a + 12