Answer
$$6a^2-5a+a-5a+3a^3=3a^3+6a^2-9a$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}6a^2-5a+a-5a+3a^3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}6a^2-5a+3a^3-4a \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}3a^3+6a^2-9a\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{a} \color{blue}{-5a} +3a^3 = 3a^3 \color{blue}{-4a} $$ |
| ② | Combine like terms: $$ 6a^2 \color{blue}{-5a} +3a^3 \color{blue}{-4a} = 3a^3+6a^2 \color{blue}{-9a} $$ |
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