Which of the following is equal to the average (arithmetic mean) of (x+2)^2 and (x-4)^2? Choose the most appropriate option
A) x^2	B) x^2+2	C) x^2-2x+10	D) x^2+2x+10	E) x^2+4x+5
Avg = [(x+2)^2 + (x-4)^2] / 2   Expanding and simplifying, (x^2 + 4x + 4 + x^2 - 8x + 16 ) / 2 = x^2 - 2x +10   Answer x^2-2x+10.
<result>C</result>
Which of the following is equal to the average (arithmetic mean) of (x+2)^2 and (x-4)^2?