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27 December, 16:44

Solve the equation by taking the square root 4 (x+1) ^2=100

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  1. 27 December, 19:32
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    Step-by-step explanation:

    4 (x+1) ²=100

    (x+1) ² = 5²

    (x+1) ² - 5² = 0

    (x+1-5) (x+1+5) = 0 by identity : a² - b ² = (a - b) (a+b)

    (x - 4) (x+6) = 0

    x - 4 = 0 or x+6 = 0

    x = 4 or x = - 6
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