Question

Вычеслить надо ))))))))

Answer 1

$a)frac{1}{2} times sqrt{144 } - 2.5 times sqrt{0.81} = \ frac{1}{2} times 12 - 2.5 times 0.9 = \ 6 - 2.25 = 3.75$
$b)3.2 times sqrt{ frac{25}{16} } - 5 = \ 3.2 times frac{5}{4} - 5 = 0.8 times 5 - 5 \ = 4 - 5 = - 1$
$c)14 sqrt{3} - 2 sqrt{27} - 5 sqrt{75} = \ 14 sqrt{3} - 2 sqrt{9 times 3} - 5 sqrt{25 times 3} = \ 14 sqrt{3} - 2 times 3 sqrt{3} - 5 times 5 sqrt{3 = } \ 14 sqrt{3} - 6 sqrt{3} - 25 sqrt{3} = - 17 sqrt{3}$
$g) sqrt{5} (2 sqrt{5} - sqrt{20}) = \ sqrt{5} times 2 sqrt{5} - sqrt{5} times sqrt{20} = \ 2 sqrt{25} - sqrt{100} = 2 times 5 - 10 = 0$