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21 February, 01:27

What are the exact solutions of x2 = 5x + 2?

x = x equals 5 plus or minus the square root of thirty-three all over 2

x = x equals negative 5 plus or minus the square root of thirty-three all over 2

x = x equals 5 plus or minus the square root of seventeen all over 2

x = x equals negative 5 plus or minus the square root of seventeen all over 2

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Answers (1)
  1. 21 February, 02:09
    0
    x^2 = 5x + 2

    x^2 - 5x - 2 = 0

    a = 1

    b = - 5

    c = - 2

    x = [-b + - sq root (b^2 - 4 ac) ] / 2a

    x = [--5 + - sq root (25 - - 8) ] / 2a

    x = [ 5 + - sq root (33) ] / 2

    Answer is "a"
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