Question
Answer
$$7x^2-9x+3+2x^2+4x-3=9x^2-5x$$
Explanation
| $$ \begin{aligned}7x^2-9x+3+2x^2+4x-3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}9x^2-5x\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{7x^2} \color{red}{-9x} + \, \color{green}{ \cancel{3}} \,+ \color{blue}{2x^2} + \color{red}{4x} \, \color{green}{ -\cancel{3}} \, = \color{blue}{9x^2} \color{red}{-5x} $$ |
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