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15 (i) Express 2x²-4 x+1 in the form a(x+b)²+c and hence state the coordinates of the minimum point, A, on the curve y=2 x²-4x+1.
The line x-y+4=0 intersects the curve y=2 x²-4x+1 at points P and Q. It is given that the coordinates of P are (3,7)
(ii) Find the coordinates of Q.
(iii) Find the equation of the line joining Q to the midpoint of AP.

15 i Express 2x4 x1 in the form axbc and hence state the coordinates of the minimum point A on the curve y2 x4x1 The line xy40 intersects the curve y2 x4x1 at p class=

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