Write 3(x−5)2−123(x - 5)^2 - 123(x−5)2−12 in the form ax2+bx+cax^2 + bx + cax2+bx+c where aaa, bbb, and c c\,c are integers.
Hence, or otherwise, write down the coordinates of the turning point of the graph of y=3(x−5)2−12y = 3(x - 5)^2 - 12y=3(x−5)2−12
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