Question

Решите 1 . если будет не лень второе тоже.

Answer 1

$\sqrt{81} - \sqrt{16} = 9 - 4 = 5$

$\sqrt{4} \times \sqrt{49} = 2 \times 7 = 14$

$\sqrt{2\ \frac{46}{49} } = \sqrt{ \ \frac{2 \times 49 + 46}{49} } = \sqrt{ \frac{144}{49} } = \frac{12}{7}$

$\frac{1}{7} \times ( \sqrt{14} ) {}^{2} = \frac{1}{7} \times \sqrt{14} \times \sqrt{14} = \frac{1}{7} \times 14 = 14 \div 7 = 2$

$\frac{1}{7} \times 14 = 14 \div 7 = 2$

$\sqrt{{5}^{2} + 24} = \sqrt{5 \times 5 + 24}$

$\sqrt{25 + 24} = \sqrt{49} = 7$

$\sqrt{4 \times (0.3 \times 0.3 + 0.07)} =$

$\sqrt{4 \times 0.16} = \sqrt{4} \times \sqrt{0.16}$

$2 \times 0.4 = 0.8$