Answer:
Step-by-step explanation:
1) 9 x 4 = 36
9 + 4 = 13
2) 9 x -4 = -36
9 + (-4) = 5
3) 4 x3 = 12
4+ 3 = 7
4) -4 x 3 = -12
-4 + 3 = -1
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3
area = l^2 = 9
so,l = = 3
