Question
Answer
$$9x^3-13x-1+13x^2+5+5x+5+3x^2-3=9x^3+16x^2-8x+6$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}9x^3-13x-1+13x^2+5+5x+5+3x^2-3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}9x^3+13x^2-13x+4+5x+5+3x^2-3 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}9x^3+13x^2-8x+9+3x^2-3 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle3}{\textcircled {3}} } }}}9x^3+16x^2-8x+6\end{aligned} $$ | |
| ① | Combine like terms: $$ 9x^3-13x \color{blue}{-1} +13x^2+ \color{blue}{5} = 9x^3+13x^2-13x+ \color{blue}{4} $$ |
| ② | Combine like terms: $$ 9x^3+13x^2 \color{blue}{-13x} + \color{red}{4} + \color{blue}{5x} + \color{red}{5} = 9x^3+13x^2 \color{blue}{-8x} + \color{red}{9} $$ |
| ③ | Combine like terms: $$ 9x^3+ \color{blue}{13x^2} -8x+ \color{red}{9} + \color{blue}{3x^2} \color{red}{-3} = 9x^3+ \color{blue}{16x^2} -8x+ \color{red}{6} $$ |
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