what is the solution of the equation x^2-1=0

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what is the solution of the equation x^2-1=0

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    0
    2021-09-10T19:21:54+00:00

    x^2 – 1 = 0
    x^2 -1^2 = 0
    (x + 1) (x – 1)  = 0
    x + 1 = 0 or x – 1 = 0
    x = -1 or x = 1

    Ans: -1 and 1

    0
    2021-09-10T19:22:25+00:00

    (x^2 – 1) factors. This is a basic factoring procedure. Make sure you know it
    Solve it like this 
    x^2 – a^2 = (x + a)(x – a)

    so for x^2 – 1 you get
    (x + sqrt(1) )  (x – sqrt(1) = (x + 1)(x-1) 
    x^2 – 1 = (x + 1)(x – 1)

    (x – 1)(x + 1) =0
    x – 1 =0
    x = 1

    x + 1 = 0
    x = – 1

    The two answers are x = 1 and x = – 1
    You might want to try these. If you post the answers, I’ll tell you how you did. Just make comments
    x^2 – 25 = 0
    x^2 – 9 =0
    x^2 – 36 = 0
    x^2 – 49 = 0

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