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Which of the following is not …

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Which of the following is not irrational? (a) (2 – √3)2 (b) (√2 + √3)2 (c) (√2 -√3)(√2 + √3) (d)27√7

    • Posted by Adarsh Kohli 1 year, 6 months ago

    CBSE > Class 10 > Mathematics
    • 2 answers

    Muskaan Syed 1 year, 6 months ago

    Because (√2-√3) (√2+√3) gives formula a^2-b^2=(a+b) (a-b). So, (√2) ^2-(√3) ^2 = 2-3 = -1. If in a/b form -1/1.Hence proved that option (c) is rational

    1Thank You

    Muskaan Syed 1 year, 6 months ago

    (c)

    1Thank You

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