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Maths Puzzle
prove that -*- = + and +*+=+
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- We have that (1+(-1)) = 0
therefore
(1+(-1))*(1+(-1)) = 0
1*(1+(-1)) + (-1)*(1+(-1)) = 0
1+(-1) + (-1)*1 + (-1)*(-1) = 0
(0) + (-1) + (-1)*(-1) = 0
-1 + (-1)*(-1) = 0
+1 + (-1) +(-1)*(-1) = +1
0 + (-1)*(-1) = 1
(-1)*(-1) = 1
- 11 years agoHelpfull: Yes(3) No(0)
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