Question

Найдите значение выражения

Answer 1

$- 3 sqrt{0.16} + 0.8 = - 3 sqrt{(0.4) {}^{2} } + 0.8 = - 3 times 0.4 + 0.8 = - 1.2 + 0.8 = - 0.4 \ frac{1}{9} ( sqrt{18} ) {}^{2} - ( frac{1}{2} sqrt{28} ) {}^{2} = frac{1}{9 } times 18 - frac{1}{4} times 28 = 2 - 7 = - 5 \ 50 ( - frac{1}{5} sqrt{3} ) {}^{2} = 50 times frac{1}{4} times 3 = 37.5$