identify the special product by writing the letter of the answer on the space provided ( question number 4 in photo )

Given:
[tex](5x+8y)^2=25x^2+80xy+64y^2[/tex][tex](5x+8y)^2=(5x+8y)(5x+8y)[/tex]Trinomials that are product of two binomials.
Option b . is the correct answer