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10 August, 19:33

Which is the solution of the quadratic equation (4y - 3) 2 = 72?

y = and y =

y = and y =

y = and y =

y = and y =

+4
Answers (1)
  1. 10 August, 20:56
    0
    To solve this quadratic equation, take the square root of both sides.

    Since the left side is a perfect square, it will just be reduced to:

    4y - 3

    For the constant on the right side, the positive and negative roots must be considered.

    √72 = ±6√2

    Equating the two:

    4y - 3 = ±6√2

    4y = 3 ± 6√2

    y = (3 ± 6√2) / 4

    y = (3 + 6√2) / 4 = 2.87

    and

    y = (3 - 6√2) / 4 = - 1.37
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