Question

please answer correctly.

Answer 1

$[( \frac{ - 2}{5})^{ - 7} \times ( \frac{ - 2}{5})^{9} ] \div (\frac{ - 2}{5})^{2} \\ \\ \\ [ (\frac{ - 2}{5}) ^{ - 7 + 9}] \div (\frac{ - 2}{5}) ^{2} \\ \\ {( \frac{ - 2}{5} })^{2} \div ( { \frac{ - 2}{5} })^{2} = {( \frac{ - 2}{5} })^{2 - 2} = \frac{ - 2}{5}^{0} = 1$