Factorization of these polynomials

Dear Student,

$$\begin{gathered} 12{\mathrm{x}}^2+61\mathrm{x}+77 \\ 12{\mathrm{x}}^2+33\mathrm{x}+28\mathrm{x}+77 \\ 3\mathrm{x}\left(4\mathrm{x}+11\right)+7\left(4\mathrm{x}+11\right) \\ \left(4\mathrm{x}+11\right)\left(3\mathrm{x}+7\right) \end{gathered}$$


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