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16 April, 09:51

Extracting the square root.

(4x+7) ^2=60

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  1. 16 April, 12:34
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    (4x + 7) ² = 60

    4x + 7 = + / - √ (60)

    4x + 7 = + / - √ (4 · 15)

    4x + 7 = + / - √ (4) √ (15)

    4x + 7 = + / - 2√ (15)

    4x = - 7 + / - 2√ (15)

    1/4 · 4x = 1/4 (7 + / - 2√ (15))

    x = 1 3/4 + / - 1/2√ (15)
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