[tex]\large\displaystyle\text{$\begin{gathered}\sf 5(3+6)x^{2} -6x^{2} \end{gathered}$}[/tex]
Add 3 and 6 to get 9.
- [tex]\large\displaystyle\text{$\begin{gathered}\sf 5\times9x^{2} -6x^{2} \end{gathered}$}[/tex]
Multiply 5 and 9 to get 45.
- [tex]\large\displaystyle\text{$\begin{gathered}\sf 45x^{2} -6x^{2} \end{gathered}$}[/tex]
Combine 45x² and −6x² to get 39x².
- [tex]\boxed{\large\displaystyle\text{$\begin{gathered}\sf \red{39x^{2} } \end{gathered}$} }[/tex]
