Question

Combine the like terms and simplify :

9m²n + 4mn - 3mn -10 + 3m²n - 16 + 8mn -2

Answer 1

Combining the like terms we have

$$\begin{gathered} =9m^{2}n+3m^{2}n+4mn-3mn+8mn-10-16-2 \\ =12m^{2}n+mn+8mn-26-2 \\ =12m^{2}n+9mn-28 \end{gathered}$$