Which of the following is equal to the average of (x+2)^2 and (x-2)^2
a. x^2
b. x^2+2
c. x^2+4
d. x^2+2x
e. x^2+4x
i dont understand
a. x^2
b. x^2+2
c. x^2+4
d. x^2+2x
e. x^2+4x
i dont understand
Average = ((x+2)^2 + (x-2)^2) / 2
= (x^2 + 4x + 4 + x^2 - 4x + 4)/2
= (2x^2 + 8) / 2
= x^2 + 4
Answer is C
