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24 September, 19:02

What is the solution set of x2 - 10 = 30x?

A. {-220, 250}

B. {-250, 220}

C. {15 - StartRoot 235 EndRoot, 15 + StartRoot 235 EndRoot}

D. {-15 - StartRoot 235 EndRoot, - 15 + StartRoot 235 EndRoot}

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Answers (1)
  1. 24 September, 19:08
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    15+sqrt (235), 15-sqrt (235)

    Step-by-step explanation:

    X^2-30x-10=0

    Use quadratic formula (b+-sqrt (b^2-4 (a) (c))) / (2 (a))

    a=1, b=-30, c=-10
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