If for two real constants a and b, the expression ax3 + 3x2 - 8x + b is exactly divisible by (x + 2) and (x 2), then

If for two real constants a and b, the expression ax3 + 3x2 - 8x + b i

1.	If for two real constants a and b, the expression ax3 + 3x2 - 8x + b is exactly divisible by (x + 2) and (x 2), then
A.	a = 2, b = 12
B.	a = 12, b = 2
C.	a = 2, b = 12
D.	a = 2, b = 12
Answer» D. a = 2, b = 12