Question

помогите пожалуйста!

Answer 1

$\frac{a {}^{2}b {}^{2} }{a {}^{2} + 2ab + b {}^{2} } \div \frac{ab}{a + b} = \frac{a {}^{2}b {}^{2} }{(a + b) {}^{2} } \times \frac{a + b}{ab}$

$= \frac{ab}{a + b} \\ a = 4 - \sqrt{3} \\ b = 4 + \sqrt{3}$

$\frac{(4 - \sqrt{3} )(4 + \sqrt{3}) }{4 + \sqrt{3} + 4 - \sqrt{3} } = \frac{16 - 3}{8} = \frac{13}{8} = 1.625$