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    Yusf's Avatar
    Yusf Posts: 198, Reputation: 3
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    #1

    Oct 29, 2015, 11:08 PM
    Is √-36= 6i or ±6i
    Will it be right to say √-36=±6i? If no then please tell why.
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Oct 30, 2015, 06:15 AM
    It is correct:
    Yusf's Avatar
    Yusf Posts: 198, Reputation: 3
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    #3

    Oct 30, 2015, 08:46 AM
    Thanks!
    Rajesh Bhuria's Avatar
    Rajesh Bhuria Posts: 1, Reputation: 1
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    #4

    Sep 28, 2016, 10:33 PM
    √-36= 6i

    since -36 can be written as -1*6*6 or -1*6^2
    therefoe \sqrt(-36)=\sqrt(-1*6^2)
    =6\sqrt(-1)
    =6i {since \sqrt(-1)=i}
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #5

    Sep 29, 2016, 05:36 AM
    Quote Originally Posted by Rajesh Bhuria View Post
    √-36= 6i

    since -36 can be written as -1*6*6 or -1*6^2
    therefoe \sqrt(-36)=\sqrt(-1*6^2)
    =6\sqrt(-1)
    =6i {since \sqrt(-1)=i}
    You are commenting on a post that is almost a year old. The correct answer is as shown in earlier posts. Rememeber that -36 can also be written as .
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