Question
Answer
$$7x^2-11+16x+5x-3x^2-7=4x^2+21x-18$$
Explanation
| $$ \begin{aligned}7x^2-11+16x+5x-3x^2-7& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}4x^2+21x-18\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{7x^2} \color{red}{-11} + \color{green}{16x} + \color{green}{5x} \color{blue}{-3x^2} \color{red}{-7} = \color{blue}{4x^2} + \color{green}{21x} \color{red}{-18} $$ |
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