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Let f (x) = x2+15x+56

What are the zeros of the function?

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Answers (2)
  1. 6 May, 08:59
    0
    -8, - 7

    Step-by-step explanation:

    f (x) = x^2+15x+56

    0 = x^2+15x+56

    What two numbers multiply together to make 56 and add together to 15

    7*8 = 56

    7+8=15

    0 = (x+8) (x+7)

    Then use the zero product property

    x+8 = 0 x+7 = 0

    x+8-8 = 0-8 x+7-7 = 0-7

    x=-8 x=-7
  2. 6 May, 09:09
    0
    -7, - 8

    Step-by-step explanation:

    x² + 15x + 56 = 0

    x² + 7x + 8x + 56 = 0

    x (x + 7) + 8 (x + 7) = 0

    (x + 7) (x + 8) = 0

    x = - 7, - 8
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