35 БАЛЛОВ! 1.) Упростить: √75a^2 при a < 0 ; -2 * √с:2/1,44+2 l c l (модуль) при с < 0....

$\sqrt{75 {a}^{2} } = \sqrt{3 \cdot (5a)^{2} } = \\ = |a| \cdot 5 \sqrt{3}$
при а<0<br> $= - 5 \sqrt{3} a \\$

$- 2 \cdot \sqrt{ \frac{ {c}^{2} }{1.44} } + 2 |c| = \\ = - 2 \cdot \sqrt{( \frac{c}{1.2} ) ^{2} } + 2 |c| = \\ = - \frac{2 |c| }{1.2} + 2 |c| = \\ = |c| \cdot ( - \frac{1}{0.6} + 2) = \\ = |c| \cdot( - \frac{5}{3} + 2) = - \frac{1}{3} \cdot \: |c|$
при с<0<br>
$= - \frac{ - c}{3} = \frac{c}{3}$

$(\sqrt{2} ) ^{2} ( - 8)^{2} = 2 \cdot 64 = 128$
$( - \sqrt{5} ) ^{2} 14 ^{4} = \\ = 5 \cdot 14 ^{4} = 192080$