SOLUTION: does a negative number x a negative number equal a positive number? ex: -4x-4= If so, can you explain the formula? Thank you

Algebra ->  Exponents-negative-and-fractional -> SOLUTION: does a negative number x a negative number equal a positive number? ex: -4x-4= If so, can you explain the formula? Thank you      Log On


   

Question 15208: does a negative number x a negative number equal a positive number?
ex: -4x-4=
If so, can you explain the formula? Thank you
Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
Yes it does;
The rule is;
when the signs are the same the answer is positive, when the signs are different the answer is negative.
Ex,
+ * + = +
-* - = +
+ * - = -
- * + = -
ex,
4*4=16
-4*-4=16
-4*4=-16
4*-4=-16
=)