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11 October, 19:41

Which set is the solution set for 3x^2-78=114

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  1. 11 October, 21:32
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    3x² - 78 = 114

    3x² = + 78 + 114

    3x² = 192

    x² = 192/3

    x² = 64 and x = - + √64, x' = 8 and x" = - 8
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