Question

Ma poate ajuta cineva la aceste 2 exerciti, va rog ?
Dau coroană!!

Answer 1

$b) \sqrt{3} \times \sqrt{15} - 2 \sqrt{75} = \sqrt{45} - 10 \sqrt{3} = 3 \sqrt{5} - 10 \sqrt{3}$

$c) \sqrt{120} \div \sqrt{10} - \sqrt{15} \div \sqrt{5} = \sqrt{12} - \sqrt{3} = 2 \sqrt{3} - \sqrt{ 3} = 2 \sqrt{3} - 1 \sqrt{3} = 1 \sqrt{3} = \sqrt{3}$