Đáp án:
$\begin{array}{l}
3{x^2} + 22xy + 11x + 37y + 7{y^2} + 10\\
= 3{x^2} + xy + 5x + 21xy + 7{y^2} + 35y + 6x + 2y + 10\\
= x\left( {3x + y + 5} \right) + 7y\left( {3x + y + 5} \right) + 2\left( {3x + y + 5} \right)\\
= \left( {3x + y + 5} \right)\left( {x + 7y + 2} \right)
\end{array}$