A rectangular garden has a walk around it of width x. The garden is 20 ft by 15 ft. Write a function representing the combined area, A(x), of the garden and walk. Write as a polynomial is standard form.

Question

A rectangular garden has a walk around it of width x.  The garden is 20 ft by 15 ft.  Write a function representing the combined area, A(x), of the garden and walk.  Write as a polynomial is standard form.

Steve · Answer

Draw a diagram. That simple step will make solution a lot easier. A(x) = (20+2x)(15+2x) Now you can expand that to standard form.