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