Answers

2014-06-09T10:05:22+08:00
-3(2)+(-2)(-3) = 0
where -3 multiply by 2 = - 6
where -2 multiply by -3 = 6
-6+6=0
0 = 0

multiplying unlike sign       = - or negative integer
while multiplying like sign  = + or positive integer

(+)(-) = -
(-)(+) = -

while

(+)(+) = +
(-)(-)   = +
0
2014-06-09T17:23:51+08:00