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2 December, 09:37

14. x 2 + 10x - 25 = 0

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Answers (2)
  1. 2 December, 09:55
    0
    28+10x-25=0

    3+10x=0

    10x=-3

    x=-0.3
  2. 2 December, 10:47
    0
    think about two numbers that will get 25:

    think about two numbers that will get 10

    use the 5 times tables

    5*5 = 25

    Use 5+5 = 10

    x^2+10x-25 = 0

    (x+5) (x+5) = 0

    x+5 = 0, x+5 = 0

    x+5-5 = 0-5

    x = - 5

    x+5-5 = 0-5

    x = - 5

    Answer:

    only x = 5
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