Write x2+4x−12x^2 + 4x - 12x2+4x−12 in the form (x+a)2+b(x + a)^2 + b(x+a)2+b where a a\,a and b b\,b are integers.
Hence, or otherwise, write down the coordinates of the turning point of the graph of y=x2+4x−12y = x^2 + 4x - 12y=x2+4x−12
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