Answer:
15
Step-by-step explanation:
If both numbers are negative when multiplying the answer will be positive :) so it's just like multiplying normally.
[tex]\tt{}15[/tex]
[tex]\tt{}( - 5) \times ( - 3)[/tex]
[tex]\tt{}5 \times 3[/tex]
[tex]\tt{}15 \\ \\ [/tex]
