Which function gives the area as a function of width?

​The length of a rectangle is 7 inches less than twice the width, w, of the rectangle. The quadratic function, A(w) represents the area A, in square inches, of the rectangle for a given value of w. Which function gives the area as a function of the width?

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w = width
2w - 7 = length   {length is 7 less than twice the width}

Area of a rectangle = width x length

A(w) = w(2w - 7)   {multiplied width by length}
A(w) = 2w² - 7w  {used distributive property}

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