consider the given number patterns. Then copy and complete the multiplication table

x 4 3 2 1 0 -1 -2 -3 -4
4 16 12 8 4 0 -4 -8 -12-16
3 12 9 6 3 0 -3 -6 -9 ?
2 8 6 4 2 0 ? ? ? ?
1 4 3 2 1 0 ? ? ? ?
0 ? ? ? ? ? ? ? ? ?
-1 ? ? ? ? ? 1 2 3 4
-2 ? ? ? ? ? ? ? ? ?
-3 ? ? ? ? ? ? ? ? ?


express the multiplication rules with (+) standards for a positive number and (-) stands for a negative number, in the following cases


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