Question

(3√200-1/2√18+1/5√50):√8

Answer 1

$(3sqrt{200}- frac{1}{2}sqrt{18}+ frac{1}{5} sqrt{50}):sqrt8= (30sqrt2-frac{3}{2}sqrt2+frac{1}{5}cdot 5sqrt2):2sqrt2=\\=sqrt2(30-frac{3}{2}+1):2sqrt2= frac{sqrt2cdot 29,5}{2sqrt2} = frac{29,5}{2} =14,75$