## Answer provided by our tutors

The quadratic equation 2x^2-3=125 is being solved without quadratic formula, by completing the square.

Once we get:

x^2 = 2^6

we take the square root on both sides of the equation and get the solutions:

x1 = 2^(6/2)

x2 = - 2^(6/2)

That is

x1 = 2^3

x1 = 8

x2 = -2^3

x2 = -8

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