What are the factored forms of the following expressions? d2 + 18d + 81
A. (d + 9)(d – 9)
B. (d + 9)2
C. (d – 81)(d – 1)
D. (d – 9)2

In terms of x, find an expression that represents the area of the shaded region. the outer square has side lengths of (x+5) and the inner square has side lengths of (x-2), as shown. area: a1 x + a2 square units submit