Question

Giúp câu E thôi nhé

Answer 1

e) \(\sqrt{3+2\sqrt{2}}-5\sqrt{2}\)

= \(\sqrt{\sqrt{2}^2+2.1.\sqrt{2}+1^2}\) - 5\(\sqrt{2}\)

= \(\sqrt{\left(\sqrt{2}+1\right)^2}\) - 5\(\sqrt{2}\)

= \(\left|\sqrt{2}+1\right|\) - \(5\sqrt{2}\)

= 1 + \(\sqrt{2}-5\sqrt{2}\)

= 1 - \(4\sqrt{2}\)

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Answer 2

e: Ta có: \(\sqrt{3+2\sqrt{2}}-5\sqrt{2}\)

\(=\sqrt{2}+1-5\sqrt{2}\)

\(=-4\sqrt{2}+1\)