Question

-7 -8 How do I Multiply these directed numbers?

Answer 1

Given:

`-7*-8`

Directed numbers are numbers with signs.

When multiplying, the following rules apply;

`\begin{gathered} -*-=+ \\ +*+=+ \\ -*+=- \\ +*-=- \end{gathered}`

Hence,

`\begin{gathered} -7*-8=(-*-)(7*8) \\ =+56 \end{gathered}`

Therefore, the answer is +56