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27 April, 20:48

Solve 5v2+25=115, where v is a real number

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Answers (2)
  1. 27 April, 20:53
    0
    5v^2 + 25 = 115

    5v^2 = 115 - 25

    5v^2 = 90

    v^2 = 90/5

    v^2 = 18 ... take the square root of both sides eliminating the ^2

    v = (+-) sqrt 18

    v = 4.24 or v = - 4.24
  2. 27 April, 21:13
    0
    Can be + or -, as V will be squared. When any - ve number is squared, it will become positive.
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