Question

Помогите, срочно, пожалуйста

Answer 1

-1
Занесем 1,4 под скобки
√((28/5)*(10/14))-√((63/5)*(10/14))=-1

Answer 2

$\left ( \sqrt{5\frac{3}{5}} -\sqrt{ 12\frac{3}{5}}\right ) :\sqrt{1,4}=\left ( \sqrt{\frac{28}{5}}-\sqrt{ \frac{63}{5}} \right ):\sqrt{\frac{14}{10}}=\\\\= \sqrt{\frac{28}{5}} \cdot \sqrt{\frac{10}{14}} -\sqrt{ \frac{63}{5}} \cdot \sqrt{\frac{10}{14}}=\sqrt{\frac{28\cdot 10}{5\cdot 14}}-\sqrt{\frac{63\cdot 10}{5\cdot 14}}=\\\\=\sqrt4-\sqrt{9}=2-3=-1$