Answers

2014-02-21T22:21:06+01:00
Pls whats the answer
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Next time lilstunner, use the comment box for a comment.
2014-02-22T09:40:48+01:00
If 1 = -1, then -1 = 1

Which means, any where we see -1, we substitute it with 1 and,
anywhere we see 1, substitute it with -1.

1 = 1
Subtract 1 from both sides
1 - 1 = 0
1² - 1² = 0
(1 - 1)(1 + 1) = 0                      (difference of two squares)
(-1 + 1)(-1 -1) = 0
(0)(-2) = 0
0 x (-2) = 0

We've proved it!
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