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5 January, 21:43

Which of the following are square roots of the number below? check all that apply

81

a. 18

b. - (81) ^1/2

c. 9

d. 81^1/2

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Answers (1)
  1. 5 January, 22:28
    0
    The answers are:

    b. - (81) ^1/2

    c. 9

    d. 81^1/2

    √a = - a^1/2 ⇒ √81 = - 81^1/2

    √a = a^1/2 ⇒ √81 = 81^1/2

    √81 = √9²

    √a² = a ⇒ √9² = 9

    √a² = - a ⇒ √9² = - 9
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