Ateacher keeps track of how many books are read by students in each class .which grade has read a higher rate of books per student? how many more books does the other grade need to read to have the same rate

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