Subtraction of two vectors can be geometrically defined as follows: to subtract b from a, place the tails of a and b at the same point, and then draw an arrow from the head of b to the head of a. This new arrow represents the vector a - b
Subtraction / Difference of vectors is performed by normal multiplication of two numbers ie. (ai->+bj->+ck->) - (di->+ej->+fk-> ). Coefficients of i, j ,k are subtracted seperately and the resultant value will also be a vector.
Vector subtraction = (ai->+bi->+ci->) - (di->+ej->+fk->)