Answer
$$(5x-3)(5x-3)=25x^2-30x+9$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}(5x-3)(5x-3)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}25x^2-15x-15x+9 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}25x^2-30x+9\end{aligned} $$ | |
| ① | Multiply each term of $ \left( \color{blue}{5x-3}\right) $ by each term in $ \left( 5x-3\right) $. $$ \left( \color{blue}{5x-3}\right) \cdot \left( 5x-3\right) = 25x^2-15x-15x+9 $$ |
| ② | Combine like terms: $$ 25x^2 \color{blue}{-15x} \color{blue}{-15x} +9 = 25x^2 \color{blue}{-30x} +9 $$ |
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