Question

сделайте с решением пж.-.

Answer 1

$frac{9}{3 - 2 sqrt{2} } = frac{9(3 + 2 sqrt{2)} }{(3 - 2 sqrt{2)(3 + 2 sqrt{2)} } } = frac{27 + 18 sqrt{2} }{ {3}^{2} - {(2 sqrt{2)} }^{2} } = frac{27 + 18 sqrt{2} }{9 - 4 times 2} = frac{27 + 18 sqrt{2} }{1} = 27 + 18 sqrt{2}$