Question: 39. Write in vertex form: y = -2x2 + 12x -17. What is the constant? 40. A cattle ranch with 6000 metres of fencing wants

39. Write in vertex form: y = -2x2 + 12x -17. What is the constant? 40. A cattle ranch with 6000 metres of fencing wants to enclose a rectangular feedlot that borders a river. If the cattle will not go into the river, what is the largest area that can be enclosed in m

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