1) ( С +3 ) \ ( С - 3) - С \ ( С + 3 ) = [ ( С + 3)^2 - C*( C - 3 ) ] \ C^2 - 9 =
= ( C^2 + 6C + 9 - C^2 + 3C ) \ C^2 - 9 = 9C + 9 \ C^2 - 9 = 9 *( C + 1 ) \ C^2 - 9
2) 9 * ( C + 1 ) \ (C -3)*(C + 3 ) * ( C - 3 ) \ (C + 1) = 1 \ ( C + 3 )
Ответ 1 \ ( С + 3 )