Algebraic expression

Question

if the perimeter of the rectangle is 39 cm what is the area of this rectangle

Answer 1

 

 39 = 2(L+w)

 

 39/2 = L + w

 

 L = 39/2 - w

 

 

Area = Lw = (39/2-w)w

 

                = (39/2)w - w^2 = A(w)  <---- Area is a function of width

 

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