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3 June, 19:00

1. Which of the following are solutions to x2 - 4x - 5 = 0? List all correct answers

a. - 5

c. - 1

b. 5

d. 1

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Answers (1)
  1. 3 June, 19:20
    0
    c. - 1

    b. 5

    Step-by-step explanation:

    x^2 - 4x - 5 = 0

    Factor

    What two numbers multiply to - 5 and add to - 1

    -5*1 = - 5

    -5+1 = - 4

    (x-5) (x+1) = 0

    Using the zero product property

    x-5 = 0 x+1 = 0

    x=5 x=-1
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