Question

An operation is defined on the set of integers by x*y=x+y+3xy
I) Construct a table for this operation on the set {-1,0,1,2}

Answer 1

so, what's the problem?
-1*0 = (-1)+(0)+3(-1)(0) = -1
-1*1 = (-1)+(1)+3(-1)(1) = -3
and so on for each element in the table.