Question
Answer
$$11x^2-24x+24(x-3)=11x^2-72$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}11x^2-24x+24(x-3)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}11x^2-24x+24x-72 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}11x^2-72\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{24} $ by $ \left( x-3\right) $ $$ \color{blue}{24} \cdot \left( x-3\right) = 24x-72 $$ |
| ② | Combine like terms: $$ 11x^2 \, \color{blue}{ -\cancel{24x}} \,+ \, \color{blue}{ \cancel{24x}} \,-72 = 11x^2-72 $$ |
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