Question
Answer
$$-1.3x^2-4+2x-1+x^2=2x-5$$
Explanation
| $$ \begin{aligned}-1.3x^2-4+2x-1+x^2& \xlongequal{ }-x^2-4+2x-1+x^2 \xlongequal{ } \\[1 em] & \xlongequal{ } -\cancel{x^2}-4+2x-1+ \cancel{x^2} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2x-5\end{aligned} $$ | |
| ① | Combine like terms: $$ \, \color{blue}{ -\cancel{x^2}} \, \color{green}{-4} +2x \color{green}{-1} + \, \color{blue}{ \cancel{x^2}} \, = 2x \color{green}{-5} $$ |
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