Question

Спростити вираз:
$( - \frac{1}{5} a {}^{ - 3} b {}^{ - 7}) {}^{ - 3} \times ( - 5a {}^{2} b {}^{6} ) {}^{ - 2}$
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Answer 1

$(-\frac{1}{5} a^{-3} b^{-7} )^{-3} *(-5a^{2} b^{6} )^{-2} = (-5)^{3} a^{9} b^{21} *(-5)^{-2} a^{-4} b^{-12}=-5a^{5} b^{9}$