Kak tolong dijawab ya

Kak tolong dijawab ya

$(25 sqrt{5} )^{ - frac{2}{5} } \ = ( {5}^{ frac{5}{2} } )^{ - frac{2}{5} } \ = 5^{ frac{5}{2} times - frac{2}{5} } \ = {5}^{ - 1} \ = frac{1}{5}$
semoga bermanfaat:')