[tex]\displaystyle\bf\\y=9x^{2} -12x+3\\\\\\X_{v} =-\frac{b}{2a} =-\frac{-12}{2\cdot 9} =\frac{2}{3} \\\\\\Y_{v} =9\cdot\Big(\frac{2}{3} \Big)^{2} -12\cdot\frac{2}{3} +3=9\cdot\frac{4}{9} -8+3=4-5=-1\\\\\\Otvet: \ \Big(\frac{2}{3} \ ; \ -1\Big)[/tex]
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[tex]\displaystyle\bf\\y=9x^{2} -12x+3\\\\\\X_{v} =-\frac{b}{2a} =-\frac{-12}{2\cdot 9} =\frac{2}{3} \\\\\\Y_{v} =9\cdot\Big(\frac{2}{3} \Big)^{2} -12\cdot\frac{2}{3} +3=9\cdot\frac{4}{9} -8+3=4-5=-1\\\\\\Otvet: \ \Big(\frac{2}{3} \ ; \ -1\Big)[/tex]