Tlg dijawab, bsk dikumpul!!!tuliskan contohny

Yg kolom itukah?

2x1 = 2
2x0 = 0
2x(-1) = -2
2x(-2) = -4

1) + × + = +
3 × 2 = 6

2) + × - = -
3 × (-5) = -15

3) - × + = -
-4 × 1 = -4

4) - × - = +
-3 × -4 = 12