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21 January, 07:07

One of the solutions to x2 - 2x - 15 = 0 is x = - 3. What is the other solution?

a. x = - 5

b. x = - 1

c. x = 1

d. x = 5

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Answers (1)
  1. 21 January, 10:30
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    x2 - 2x - 15 = 0

    (x+3) (x-5) = 0

    x + 3 = 0 so x = - 3

    x - 5 = 0 so x = 5

    answer is d. x = 5
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