Question

√75 (√20-√125) (1 pe 3)la 1

Answer 1

$\sqrt{75} ( \sqrt{20} - \sqrt{125} ) \cdot ( \frac{1}{3} )^1=5 \sqrt{3} (2 \sqrt{5} -5 \sqrt{5} ) \cdot \frac{1}{3} = \\ =5 \sqrt{3} \cdot (-3 \sqrt{5} ) \cdot \frac{1}{3} =-15 \sqrt{15} \cdot \frac{1}{3} = \frac{-15 \sqrt{15} }{3} =-5 \sqrt{15}$