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18 March, 18:24

Which of the following is a solution of x^2-7x=5

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Answers (1)
  1. 18 March, 18:39
    0
    x=

    7

    2

    +

    1

    2

    √69 or x=

    7

    2

    +

    -1

    2

    √69

    Step-by-step explanation:

    Step 1: Subtract 5 from both sides.

    x2-7x-5=5-5

    x2-7x-5=0

    Step 2: Use quadratic formula with a=1, b=-7, c=-5.

    x=

    -b±√b2-4ac

    2a

    x=

    - (-7) ±√ (-7) 2-4 (1) (-5)

    2 (1)

    x=

    7±√69

    2

    x=

    7

    2

    +

    1

    2

    √69 or x=

    7

    2

    +

    -1

    2

    √69
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