Answer
$$x^1+x^2+2x^0-0x-(1\cdot2+2+0+0)=x^2+x-2$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}x^1+x^2+2x^0-0x-(1\cdot2+2+0+0)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}x^2+x+2-4 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}x^2+x-2\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{x} +x^2+2 \color{blue}{0x} = x^2+ \color{blue}{x} +2 $$Combine like terms: $$ \color{blue}{2} + \color{red}{2} \, \color{green}{ \cancel{0}} \, \, \color{green}{ \cancel{0}} \, = \color{green}{4} $$ |
| ② | Combine like terms: $$ x^2+x+ \color{blue}{2} \color{blue}{-4} = x^2+x \color{blue}{-2} $$ |
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