if x * y = xy – 2 ( x + y ) for all integers x and y , then 5 * ( – 3 ) =
5 * ( - 3 ) = 5 * ( - 3 ) - 2 ( 5 + ( - 3 ) ) = - 15 - 4 = - 19 option ( a )
add(negate(multiply(add(negate(3), 5), const_2)), multiply(negate(3), 5))