Question

2 номер!!дам 20 баллов!!!!!!очень срочно

Answer 1

$1) \: 4 \sqrt{5} = \sqrt{5 \times 16} = \sqrt{80}$

$2) \: 2 \sqrt{10} = \sqrt{10 \times 4} = \sqrt{40}$

$3) \: 3 \sqrt{8} = \sqrt{8 \times 9} = \sqrt{72}$

$4) \: - 3 \sqrt{2} = - \sqrt{2 \times 9} = - \sqrt{18}$

$5) \: 8 \sqrt{a} = \sqrt{a \times 64} = \sqrt{64a}$