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Question
Divide −21abc2 by 7abc.
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Solution
\[\frac{- 21ab c^2}{7abc}\]
\[ = \frac{- 21 \times a \times b \times c \times c}{7 \times a \times b \times c}\]
\[ = - 3 a^{(1 - 1)} b^{(1 - 1)} c^{(2 - 1)} \]
\[ = - 3c\]
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