Posted by jill on Wednesday, August 24, 2011 at 10:26pm.
a^2 + 2b + 2a^2 = 3a^2 + 2b 2 * ( a^2 + 2b + 2a^2 ) + b + 2c = 2 * ( 3a^2 + 2b ) + b + 2c = 6a^2 + 4b + b + 2c = 6a^2 + 5b + 2c
6a^2 - a^2 + 16 = 5a^2 + 16
8^2 divid 16x2-5