Tap the blue circles to see an explanation.
| $$ \begin{aligned}1+p\cdot(-2)+\frac{p(p-1)}{2}\cdot4+\frac{p(p-1)(p-2)}{6}\cdot(-8)+\frac{p(p-1)(p-2)(p-3)}{24}\cdot16& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} \htmlClass{explanationCircle explanationCircle3}{\textcircled {3}} } }}}1+p\cdot(-2)+\frac{p^2-p}{2}\cdot4+\frac{(1p^2-p)(p-2)}{6}\cdot(-8)+\frac{(1p^2-p)(p-2)(p-3)}{24}\cdot16 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle4}{\textcircled {4}} \htmlClass{explanationCircle explanationCircle5}{\textcircled {5}} \htmlClass{explanationCircle explanationCircle6}{\textcircled {6}} } }}}1+p\cdot(-2)+\frac{4p^2-4p}{2}+\frac{p^3-2p^2-p^2+2p}{6}\cdot(-8)+\frac{(1p^3-2p^2-p^2+2p)(p-3)}{24}\cdot16 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle7}{\textcircled {7}} \htmlClass{explanationCircle explanationCircle8}{\textcircled {8}} \htmlClass{explanationCircle explanationCircle9}{\textcircled {9}} } }}}\frac{4p^2-8p+2}{2}+\frac{p^3-3p^2+2p}{6}\cdot(-8)+\frac{(1p^3-3p^2+2p)(p-3)}{24}\cdot16 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle10}{\textcircled {10}} \htmlClass{explanationCircle explanationCircle11}{\textcircled {11}} \htmlClass{explanationCircle explanationCircle12}{\textcircled {12}} } }}}\frac{4p^2-8p+2}{2}+\frac{-8p^3+24p^2-16p}{6}+\frac{p^4-3p^3-3p^3+9p^2+2p^2-6p}{24}\cdot16 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle13}{\textcircled {13}} \htmlClass{explanationCircle explanationCircle14}{\textcircled {14}} } }}}\frac{-8p^3+36p^2-40p+6}{6}+\frac{p^4-6p^3+11p^2-6p}{24}\cdot16 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle15}{\textcircled {15}} \htmlClass{explanationCircle explanationCircle16}{\textcircled {16}} } }}}\frac{-8p^3+36p^2-40p+6}{6}+\frac{16p^4-96p^3+176p^2-96p}{24} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle17}{\textcircled {17}} } }}}\frac{16p^4-128p^3+320p^2-256p+24}{24}\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{p} $ by $ \left( p-1\right) $ $$ \color{blue}{p} \cdot \left( p-1\right) = p^2-p $$ |
| ② | Multiply $ \color{blue}{p} $ by $ \left( p-1\right) $ $$ \color{blue}{p} \cdot \left( p-1\right) = p^2-p $$ |
| ③ | Multiply $ \color{blue}{p} $ by $ \left( p-1\right) $ $$ \color{blue}{p} \cdot \left( p-1\right) = p^2-p $$ |
| ④ | Multiply $ \dfrac{p^2-p}{2} $ by $ 4 $ to get $ \dfrac{ 4p^2-4p }{ 2 } $. Step 1: Write $ 4 $ as a fraction by putting $ \color{red}{ 1 } $ in the denominator. Step 2: Multiply numerators and denominators. Step 3: Simplify numerator and denominator. $$ \begin{aligned} \frac{p^2-p}{2} \cdot 4 & \xlongequal{\text{Step 1}} \frac{p^2-p}{2} \cdot \frac{4}{\color{red}{1}} \xlongequal{\text{Step 2}} \frac{ \left( p^2-p \right) \cdot 4 }{ 2 \cdot 1 } = \\[1ex] & \xlongequal{\text{Step 3}} \frac{ 4p^2-4p }{ 2 } \end{aligned} $$ |
| ⑤ | Multiply each term of $ \left( \color{blue}{p^2-p}\right) $ by each term in $ \left( p-2\right) $. $$ \left( \color{blue}{p^2-p}\right) \cdot \left( p-2\right) = p^3-2p^2-p^2+2p $$ |
| ⑥ | Multiply each term of $ \left( \color{blue}{p^2-p}\right) $ by each term in $ \left( p-2\right) $. $$ \left( \color{blue}{p^2-p}\right) \cdot \left( p-2\right) = p^3-2p^2-p^2+2p $$ |
| ⑦ | Add $1-2p$ and $ \dfrac{4p^2-4p}{2} $ to get $ \dfrac{ \color{purple}{ 4p^2-8p+2 } }{ 2 }$. Step 1: Write $ 1-2p $ as a fraction by putting $ \color{red}{ 1 } $ in the denominator. Step 2: To add raitonal expressions, both fractions must have the same denominator. |
| ⑧ | Combine like terms: $$ p^3 \color{blue}{-2p^2} \color{blue}{-p^2} +2p = p^3 \color{blue}{-3p^2} +2p $$ |
| ⑨ | Combine like terms: $$ p^3 \color{blue}{-2p^2} \color{blue}{-p^2} +2p = p^3 \color{blue}{-3p^2} +2p $$ |
| ⑩ | Add $1-2p$ and $ \dfrac{4p^2-4p}{2} $ to get $ \dfrac{ \color{purple}{ 4p^2-8p+2 } }{ 2 }$. Step 1: Write $ 1-2p $ as a fraction by putting $ \color{red}{ 1 } $ in the denominator. Step 2: To add raitonal expressions, both fractions must have the same denominator. |
| ⑪ | Multiply $ \dfrac{p^3-3p^2+2p}{6} $ by $ -8 $ to get $ \dfrac{ -8p^3+24p^2-16p }{ 6 } $. Step 1: Write $ -8 $ as a fraction by putting $ \color{red}{ 1 } $ in the denominator. Step 2: Multiply numerators and denominators. Step 3: Simplify numerator and denominator. $$ \begin{aligned} \frac{p^3-3p^2+2p}{6} \cdot -8 & \xlongequal{\text{Step 1}} \frac{p^3-3p^2+2p}{6} \cdot \frac{-8}{\color{red}{1}} \xlongequal{\text{Step 2}} \frac{ \left( p^3-3p^2+2p \right) \cdot \left( -8 \right) }{ 6 \cdot 1 } = \\[1ex] & \xlongequal{\text{Step 3}} \frac{ -8p^3+24p^2-16p }{ 6 } \end{aligned} $$ |
| ⑫ | Multiply each term of $ \left( \color{blue}{p^3-3p^2+2p}\right) $ by each term in $ \left( p-3\right) $. $$ \left( \color{blue}{p^3-3p^2+2p}\right) \cdot \left( p-3\right) = p^4-3p^3-3p^3+9p^2+2p^2-6p $$ |
| ⑬ | Add $ \dfrac{4p^2-8p+2}{2} $ and $ \dfrac{-8p^3+24p^2-16p}{6} $ to get $ \dfrac{ \color{purple}{ -8p^3+36p^2-40p+6 } }{ 6 }$. To add raitonal expressions, both fractions must have the same denominator. |
| ⑭ | Combine like terms: $$ p^4 \color{blue}{-3p^3} \color{blue}{-3p^3} + \color{red}{9p^2} + \color{red}{2p^2} -6p = p^4 \color{blue}{-6p^3} + \color{red}{11p^2} -6p $$ |
| ⑮ | Add $ \dfrac{4p^2-8p+2}{2} $ and $ \dfrac{-8p^3+24p^2-16p}{6} $ to get $ \dfrac{ \color{purple}{ -8p^3+36p^2-40p+6 } }{ 6 }$. To add raitonal expressions, both fractions must have the same denominator. |
| ⑯ | Multiply $ \dfrac{p^4-6p^3+11p^2-6p}{24} $ by $ 16 $ to get $ \dfrac{ 16p^4-96p^3+176p^2-96p }{ 24 } $. Step 1: Write $ 16 $ as a fraction by putting $ \color{red}{ 1 } $ in the denominator. Step 2: Multiply numerators and denominators. Step 3: Simplify numerator and denominator. $$ \begin{aligned} \frac{p^4-6p^3+11p^2-6p}{24} \cdot 16 & \xlongequal{\text{Step 1}} \frac{p^4-6p^3+11p^2-6p}{24} \cdot \frac{16}{\color{red}{1}} = \\[1ex] & \xlongequal{\text{Step 2}} \frac{ \left( p^4-6p^3+11p^2-6p \right) \cdot 16 }{ 24 \cdot 1 } \xlongequal{\text{Step 3}} \frac{ 16p^4-96p^3+176p^2-96p }{ 24 } \end{aligned} $$ |
| ⑰ | Add $ \dfrac{-8p^3+36p^2-40p+6}{6} $ and $ \dfrac{16p^4-96p^3+176p^2-96p}{24} $ to get $ \dfrac{ \color{purple}{ 16p^4-128p^3+320p^2-256p+24 } }{ 24 }$. To add raitonal expressions, both fractions must have the same denominator. |