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1 July, 10:20

49b^2 - 256 = 0

Solve, and show steps if you can!

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  1. 1 July, 12:00
    0
    Note that 49b^2 - 256 = 0 is the difference of two squares. Thus, 49b^2 - 256 = 0 can be re-written as

    (7b) ^2 - 16^2 = 0, which factors into (7b+16) (7b-16) = 0.

    Solving for b: 7b+16=0 becomes b = - 16/7, and

    7b-16=0 becomes b = 16/7.

    As expected, this 2nd order equation has 2 solutions.
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