Question

(1/7)^2*7-1/7*15
найдите значение выражения

Answer 1

$<var>(\frac{1}{7})^2*7-\frac{1}{7}*15= \frac{1}{7}(\frac{1}{7}*7-15) = \frac{1}{7}(1-15) = -\frac{14}{7} = -2</var>$