Explanation
The question wants us to expand the given expression
[tex](x+3)^2[/tex]
To expand this, we will have
[tex](x+3)^2=(x+3)\times(x+3)[/tex]
We can now use the FOIL method of expansion
'
So that
[tex]\begin{gathered} first=x\times x=x^2 \\ outer=x\times3=3x \\ inner=3\times x=3x \\ last=3\times3=9 \end{gathered}[/tex]
Combining the values above
[tex]x^2+3x+3x+9=x^2+6x+9[/tex]
The answer is: x²+6x+9
