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14 January, 10:02

What is the solution set of x2 - 10 = 30x? {-220, 250} {-250, 220} {15 -, 15 + } {-15 -, - 15 + }

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Answers (2)
  1. 14 January, 10:14
    0
    x^2 - 10 = 30x

    x^2 = 30x + 10

    x^2 - 30x = 10

    x^2 - 30x + 225 = 235

    (x - 15) ^2 = 235

    x - 15 = √235

    x = 15 ± √235 is the solution set.
  2. 14 January, 13:27
    0
    Option C on E2020

    Step-by-step explanation:

    Just got it correct on the assignment.
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