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19 August, 18:40

Ulrich says that the solutions to the quadratic equation 2x2-7x-15=0 are x=-32 and x=5. Which statement correctly describes his solution?

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Answers (2)
  1. 19 August, 19:45
    0
    Step-by-step explanation:

    Given the quadratic equation,

    2x²-7x-15

    To get the solution to the equation, we need to factorise as shown:

    x = - b±√b²-4ac/2a

    a = 2, b = - 7, c = - 15

    x = - (-7) ±√ (-7) ²+4 (2) (-15) / 2 (2)

    x = 7±√49+120/4

    x = 7±√169/4

    x = 7±13/4

    x = 7+13/4 or 7-13/4

    x = 20/4 or - 6/4

    x = 5 or - 3/2

    It can be described that the final answer to the system of equation are 5 and - 3/2 which are both an integer and a fraction
  2. 19 August, 21:49
    0
    Answer: correct

    Step-by-step explanation:

    He is correct because his equation in factored form is (2x+3) (x-5) = 0
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