Question
Answer
$$16-(4x)^2=-16x^2+16$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}16-(4x)^2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}16-16x^2 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-16x^2+16\end{aligned} $$ | |
| ① | $$ \left( 4x \right)^2 = 4^2x^2 = 16x^2 $$ |
| ② | Combine like terms: $$ -16x^2+16 = -16x^2+16 $$ |
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