Question

$- sqrt{0.2} ( sqrt{98} times sqrt{10} + sqrt{1.8} )$

Answer 1

$-sqrt{0,2}(sqrt{98}*sqrt{10}+sqrt{1,8})=-sqrt{0,2}(sqrt{49*2*2*5}+sqrt{0,36*5})=-sqrt{0,2}(7*2sqrt{5}+0,6sqrt{5})=-sqrt{0,2}*14,6sqrt{5}==-14.6*sqrt{0,2*5}= -14,6}$