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29 November, 05:39

X squared + 2x - 15 = 0

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Answers (2)
  1. 29 November, 06:10
    0
    Step-by-step explanation:

    x=-5 or x=3

    Explanation:

    the factors of - 15 which sum to + 2 are + 5 and - 3

    ⇒ (x+5) (x-3) = 0

    equate each factor to zero and solve for x

    x+5=0⇒x=-5

    x-3=0⇒x=3
  2. 29 November, 07:23
    0
    3 or - 5

    Step-by-step explanation:

    x^2 + 2x - 15 = 0

    To solve this you need to factorise:

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

    Now find the x value for each of these brackets

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

    x = - 5 or x = 3
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