Question
Answer
$$(6x-9)(6x-9)=36x^2-108x+81$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}(6x-9)(6x-9)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}36x^2-54x-54x+81 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}36x^2-108x+81\end{aligned} $$ | |
| ① | Multiply each term of $ \left( \color{blue}{6x-9}\right) $ by each term in $ \left( 6x-9\right) $. $$ \left( \color{blue}{6x-9}\right) \cdot \left( 6x-9\right) = 36x^2-54x-54x+81 $$ |
| ② | Combine like terms: $$ 36x^2 \color{blue}{-54x} \color{blue}{-54x} +81 = 36x^2 \color{blue}{-108x} +81 $$ |
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