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June 2011 p11 q10i
298
Express \(2x^2 - 4x + 1\) in the form \(a(x + b)^2 + c\) and hence state the coordinates of the minimum point, \(A\), on the curve \(y = 2x^2 - 4x + 1\).
Solution
To express \(2x^2 - 4x + 1\) in the form \(a(x + b)^2 + c\), we complete the square: