Question: A rectangular frame is to be made from a piece of wire 120 cm long. a If the width is x cm, show that the

A rectangular frame is to be made from a piece of wire 120 cm long. a If the width is x cm, show that the length is 60 x. b Find an expression for the area of the rectangle in terms of x. c Hence, find the dimensions for maximum area. d Find the maximum area.

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