Question

найдите значение выражения

Answer 1

$15*( \frac{1}{5} )^2-8* \frac{1}{5} =15* \frac{1}{25}- \frac{8}{5} = 0.6- \frac{16}{10}=0.6-1.6=-1$

$\frac{1}{25} =$ 0.6


$18( \frac{1}{9} )^2-20* \frac{1}{9} = 18( \frac{1}{81} )- \frac{20}{9} = \frac{2}{9} -2 \frac{2}{9} =-2$