Answer:
[tex]\large\boxed{90+27=9(10+3)}[/tex]
Step-by-step explanation:
[tex]\begin{array}{c|c}90&2\\45&3\\15&3\\5&5\\1\end{array}\\\\90=2\cdot\boxed3\cdot\boxed3\cdot5\\\\\begin{array}{c|c}27&3\\9&3\\3&3\\1\end{array}\\\\27=\boxed3\cdot\boxed3\cdot3\\\\GCF(90,\ 27)=\boxed3\cdot\boxed3=9\\\\90+27=\boxed9\cdot10+\boxed9\cdot3=\boxed9(10+3)[/tex]
