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  • 07-11-2016
  • Mathematics
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solve the equation 10a^2-10=630 by taking square root

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Аноним Аноним
  • 07-11-2016
10a^2-10   = 630
10(a^2 - 1) = 630
    (a^2 - 1) = 630/10
      a^2 - 1 = 63
           a^2 = 63 + 1
           a^2 = 64
           a = +- 8

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