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21 August, 23:36

What is the value of c so that - 9 and 9 are both solutions of x^2 + c = 103?

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Answers (1)
  1. 22 August, 00:06
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    c = 22

    Step-by-step explanation:

    The given equation can be written as ...

    x^2 = 103 - c

    In order for - 9 and + 9 to be solutions, the equation needs to be ...

    x^2 = 81

    So, we must have ...

    103 - c = 81

    c = 103 - 81 = 22

    The value of c must be 22.
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