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9 x^2 + 6x + 11 should be minimum

take derivative

I dont think so

You should take derivative first..

or complete the squre for 9 x^2 + 6x + 11

18 x + 6

well so x=-2 will minimize 9 x^2 + 6x + 11 and consequencly will maximize
5/9 x^2 + 6x + 11

hw u got x = -2

The answer should be x = -1/3

sorry 18 x + 6=0 then x=-1/3

got it thxxx

Why was I sent this in a message? xD