Question
Answer
$$5sqrt\cdot815sqrt\cdot(-4)=-8100q^2r^2s^2t^2$$
Explanation
| $$ \begin{aligned}5sqrt\cdot815sqrt\cdot(-4)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}405qrst-20qrst \xlongequal{ } \\[1 em] & \xlongequal{ }-8100q^2r^2s^2t^2\end{aligned} $$ | |
| ① | $$ 5 s q r t \cdot 81 = 405 q r s t $$$$ 5 s q r t \cdot -4 = -20 q r s t $$ |
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