$$ \begin{aligned}12 \cdot \frac{x^{10}}{3x^2}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{12x^{10}}{3x^2}\end{aligned} $$ | |
① | Step 1: Write $ 12 $ as a fraction by putting $ \color{red}{1} $ in the denominator. Step 2: Multiply numerators and denominators. Step 3: Simplify numerator and denominator. $$ \begin{aligned} 12 \cdot \frac{x^{10}}{3x^2} & \xlongequal{\text{Step 1}} \frac{12}{\color{red}{1}} \cdot \frac{x^{10}}{3x^2} \xlongequal{\text{Step 2}} \frac{ 12 \cdot x^{10} }{ 1 \cdot 3x^2 } = \\[1ex] & \xlongequal{\text{Step 3}} \frac{ 12x^{10} }{ 3x^2 } \end{aligned} $$ |