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31 December, 22:50

3r^2-8r-28=0

Solve with quadratic formula

+2
Answers (2)
  1. 31 December, 23:03
    0
    R = 8 + - sqrt (64-4*3*-28) / 6

    r = 8 + - sqrt (64--336) / 6

    r = 8 + - sqrt (400) / 6

    r = (8 + - 20) / 6

    r = 14/3 or - 2
  2. 1 January, 00:01
    0
    (8 plus of minus radical 64 + 216

    divided by

    6

    (8 + or - 16.73320053) / 6
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