SOLUTION: If two numbers have opposite signs, their product is,....

You can put this solution on YOUR website!
To muliply or divide signed numbers, treat them just like regular numbers but remember this rule: An odd number or negative signs will produce a negative answer. An even number of negative signs will produce a positive answer.
Or simply
Postive X Positive = Positive
Negative X Positive is the same as Positive x Negative = Negative
Negative x Negative = Positive