Rationalise the denominator. 1/√5+√2​

Question

Rationalise the denominator.
1/√5+√2​

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Neala 4 years 2021-08-16T03:25:57+00:00 1 Answers 9 views 0

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  1. Edana
    0
    2021-08-16T03:27:20+00:00
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    Step-by-step explanation:

    \frac{1}{ \sqrt{5} + \sqrt{2} } \\ = \frac{1}{ \sqrt{5} + \sqrt{2} } \times \frac{\sqrt{5} - \sqrt{2} }{ \sqrt{5} - \sqrt{2} } \\ \\ = \frac{ \sqrt{5} - \sqrt{2} }{ {( \sqrt{5)} }^{2} - {( \sqrt{2)} }^{2} } \\ \\ = \frac{ \sqrt{5} - \sqrt{2} }{5 - 2 } \\ \\ = \frac{ \sqrt{5} - \sqrt{2} }{3}

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )