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19 September, 20:36

B²+b=2 how to complete the square

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  1. 19 September, 20:52
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    B^2 + b = 2

    b^2 + b + 1/4 = 2 + 1/4

    (b + 1/2) ^2 = 9/4

    b + 1/2 = (+-) sqrt 9/4

    b + 1/2 = (+-) 3/2

    b = - 1/2 + 3/2 = 2/2 = 1

    b = - 1/2 - 3/2 = - 4/2 = - 2
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