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Statement 2) is definitely enough on its own: if mn < 0, then m and n have opposite signs, so they can't be equal.albertrahul wrote:Is m != n?
[!= : not equals]
(1) m + n < 0
(2) mn < 0
1/4 is not less than zero!albertrahul wrote:Thanks for reply Ian. OG also provides similar solution.
However, I want to know that why can't I assume m = 1/2 and n = 1/2, this also satisfies statement 2.
1/2 * 1/2 = 1/4 < 0
