If 2x^2 is 4, we can start by dividing both sides of the equation by 2 to get x^2 by itself. This gives us:

2x^2 = 4
x^2 = 2

To solve for x, we need to take the square root of both sides of the equation:

sqrt(x^2) = sqrt(2)

Since the square root of x^2 is simply x (because square root and squaring cancel each other out), we can simplify further:

x = +/- sqrt(2)

Therefore, x could be either the positive or negative square root of 2.
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