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11 June, 19:10

Solve for b:

b² = 8b + 84

+3
Answers (1)
  1. 11 June, 19:38
    0
    B² = 8b + 84

    b² - 8b - 84 = 0

    b = - (-8) + / - √ ((8) ² - 4 (1) (-84))

    2 (1)

    b = 8 + / - √ (64 + 336)

    2

    b = 8 + / - √ (400)

    2

    b = 8 + / - 20

    2

    b = 4 + 10

    b = 4 + 10 b = 4 - 10

    b = 14 b = - 6
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