〖(a-b-c)〗^2 > 0 a^2+b^2+c^2-2ab-2ac-2bc>0 a^2+b^2+c^2 >2ab+2ac+2bc a^2/abc+b^2/abc+c^2/abc > 2ab/abc+2ac/abc+2bc/abc a/bc+b/ac+c/ab > 2/c+2/b+2/a