11question and first reply posted at the same time!. How? [3]
prove that for all x,y εR
x2 - 2 x y + 3 y2- 6x - 2y ≥ -11 .
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7 Answers
11
21now its my turn for plagiarism coz i just saw that question and one of its replies stated that this inequality is not valid for all real nos. supported by a graph!!!!!!!!
1put x=3,y=1;
3*3 - 2*3*1 + 3*1*1 - 6*3 - 2*1=9-6+3-18-2=-14;
can u check ur question again
3yes this was the ans given by the other user at goiit
i want to confirm dat the question is rong.
so i asked u people