Question
Answer
$$4x^2-4x+4+9x^3-7x=9x^3+4x^2-11x+4$$
Explanation
| $$ \begin{aligned}4x^2-4x+4+9x^3-7x& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}9x^3+4x^2-11x+4\end{aligned} $$ | |
| ① | Combine like terms: $$ 4x^2 \color{blue}{-4x} +4+9x^3 \color{blue}{-7x} = 9x^3+4x^2 \color{blue}{-11x} +4 $$ |
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