find the polynomial for the perimeter and for the area?

Question

find the polynomial for the perimeter and for the area x+9 is listed on top a x is listed on left side of a rectangle

Answer 1

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perimeter: P = 2(side 1) + 2(side 2)

P = 2(x+9) + 2x

P = 2x + 18 + 2x

P = 4x + 18 <===ANSWER

Area: A = side 1 * side 2

A = (x+9) * x

A = x^2 + 9x <===ANSWER

Source(s): i was a math major, points are appreciated, thanks hope this helps

Answer 2

Based on the given data,

L = length of the rectangle = (x + 9)

W = width of the rectangel = x

Perimeter = P = 2(L + W) and substituting

L = x + 9 and W = x,

the above perimeter formula becomes

P = 2[x + (x + 9)]

P = 2(2x + 9)

For the area,

A = LW and again, substituting L = x + 9 and W = x

A = x(x + 9)

A = x^2 + 9x