Evaluate the integral. (Remember to use absolute values where appropriate. Use ( C∫ √x²+2x , dx )):
a) ( 2/3(x²+2x)3/2 + C )
b) ( 2/3(x²+2x)1/2 + C )
c) ( 1/3(x²+2x)3/2 + C )
d) ( 1/3(x²+2x)1/2 + C )