Media Summary: Finding points of intersection between two Let a,b,c,d be real numbers with a + d = b + c, prove that S = (a − b)(c − d) + (a − c)(b − d) + (d − a)(b − c) ≥ 0.
Finding points of intersection between two Let a,b,c,d be real numbers with a + d = b + c, prove that S = (a − b)(c − d) + (a − c)(b − d) + (d − a)(b − c) ≥ 0.
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Let a,b,c,d be real numbers with a + d = b + c, prove that S = (a − b)(c − d) + (a − c)(b − d) + (d − a)(b − c) ≥ 0.
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