Question

Пожалуйста, помогиите :(((

Answer 1

1)

$\sqrt{7y {?}^{2} } = |y| \sqrt{7} = - y \sqrt{7}$

2)

$\sqrt{32x ^{8} } = \sqrt{4 \times 4 \times 2 \times x ^{8} } = |x ^{4} | \times 4 \sqrt{2} = 4x ^{4} \sqrt{2}$

3)

$\sqrt{ - x ^{13} } = \sqrt{x {}^{12} \times x} = |x {}^{6} | \sqrt{x} = x {}^{6} \sqrt{x}$

4)

$\sqrt{ - x {}^{14}y {}^{3} } = x {}^{7} \sqrt{ - y {}^{2} \times y } = x {}^{7} y \sqrt{ - y}$

#9

$\sqrt{(5 - \sqrt{12} ) {}^{2} } + \sqrt{(3 - \sqrt{12} ) {}^{2} } = |5 - \sqrt{12} | + |3 - \sqrt{12} | = 5 - \sqrt{12} + \sqrt{12} - 3 = 2$

фух, это всё