Answer
$$x^2-4x^2-13x^2+11x^2=-5x^2$$
Explanation
| $$ \begin{aligned}x^2-4x^2-13x^2+11x^2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-5x^2\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{x^2} \color{red}{-4x^2} \color{green}{-13x^2} + \color{green}{11x^2} = \color{green}{-5x^2} $$ |
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