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Mathematics, 05.03.2021 20:40 224509

WILL MARK BRAINLEST Karen is adding a border to a rectangular poster. The border will have a uniform width of x inches and run along all four sides, so Karen uses the functions l and w to model the length and width, in inches, of her poster after she adds the border.
l(x) = 2x + 18
w(x) = 2x + 24

Which function correctly represents the total area, in square inches, of Karen’s poster, when a border x inches wide is included in the area?

A. A(x) = 4x2 + 42x + 432
B. A(x) = 4x + 432
C. A(x) = 4x2 + 84x + 432
D. A(x) = 4x2 + 432

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