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The curve of the functions f(x) = x + Bx-12x+7 passes through (1, 0) and has a stationary value at (-2, 27). (a) Show that

The curve of the functions f(x) = x² + Bx²-12x+7 passes through (1, 0) and has a stationary value at (-2, 27).
(a) Show that ?=2 and B=3.
(b) Find the other turning point.
(c) Determine the other point where the curve cuts the x-axis.

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