Question
Answer
$$x+2+(x-1)x=x^2+2$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}x+2+(x-1)x& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}x+2+x^2-x \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}x^2+2\end{aligned} $$ | |
| ① | $$ \left( \color{blue}{x-1}\right) \cdot x = x^2-x $$ |
| ② | Combine like terms: $$ \, \color{blue}{ \cancel{x}} \,+2+x^2 \, \color{blue}{ -\cancel{x}} \, = x^2+2 $$ |
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