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Write wheather 2√45+2√20/2√5 on simplification gives …

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Write wheather 2√45+2√20/2√5 on simplification gives a rational or an irrational number

    • Posted by Ajeet Singh 6 years, 8 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Yogita Ingle 6 years, 8 months ago

    2√45+2√20/2√5
    2√3×3×5 + 2√2×2×5/2√5
    2×3√5 + 2×2√5/2√5
    6√5 + 4√5/2√5
    = 10√5/2√5
    5
    hence it is rational number

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