We will solve the following:
[tex](9y+2)^2=81y^2+36y+4[/tex]***Explanation***
We will have that in order to expand a polynomial of the form:
[tex](a+b)^2[/tex]We will proceed by using the following rule:
[tex](a+b)^2=a^2+2ab+b^2[/tex]In our case the solution for the given polynomial is [Step by step]:
[tex](9y+2)^2=(9y)^2+2(9y)(2)+(2)^2[/tex][tex]\Rightarrow(9y+2)^2=81y^2+36y+4[/tex]