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9 June, 03:15

What are the solutions to the equation?

25x^2-9=0

+1
Answers (2)
  1. 9 June, 04:56
    0
    25x² - 9 = 0

    25x² + 0x - 9 = 0

    x = - (0) + / - √ ((0) ² - 4 (25) (-9))

    2 (25)

    x = 0 + / - √ (0 + 900)

    50

    x = 0 + / - √ (900)

    50

    x = 0 + / - 30

    50

    x = 0 + 30 x = 0 - 30

    50 50

    x = 30 x = - 30

    50 50

    x = 0.6 x = - 0.6
  2. 9 June, 05:27
    0
    Workings:

    25x^2-9=0

    (5x+3) (5x-3) = 0

    x = 3/5 or - 3/5
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