what is 4z−(−3z)?
4z−(−3z)
\(=4z - - 3z\\ =4z +3z\\ =7z\\ \)
4z-(-3z)
* Product of two negative numbers gives you a positive number.
4z+3z=7z
Product means multiply.
The product of -3 and -4 is +12, that is true but it has nothing to do with this question. :)
