Answer:
[tex]B^{2}=81[/tex]
Step-by-step explanation:
As you have that B = 9
And you have the expression [tex]B^{2}[/tex], that means that you have to take the given number and to multiply it itself 2 times, that is:
[tex]B^{2}=B*B[/tex]
[tex]B^{2}=9*9[/tex]
[tex]B^{2}=81[/tex]
