The area of ??the large rectangle is

The area of ??the non-shaded part is

The area of ??the shaded part is

The coefficient of this monomial is 5, The degree is 2

First find the area of ??the non-shaded part according to the area formula of the triangle, and then find the area of ??the large rectangle.

The area of ??the large rectangle is

The area of ??the unshaded part is

The area of ??the shaded part is

The coefficient of this monomial is 5, The degree is 2

This question mainly tests the knowledge of sequence algebraic expressions, and also examines the area formula of triangles. Pay attention to the method of finding the area of ??irregular figures, which embodies the idea of ??transformation.