Let the polynomials A = 7x 2 + 3xy and B = -3xy . Determine A . B (multiplication)

a) - 21x 2 – 9xy
b) 21x 2 + 9xy
c) – 7x 2 – 3xy
d) 7x 3 + 3x 2 y 2
e) – 21x 3 y – 9x 2 y 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