GMAT Problem Solving (PS) | Re: If [[x]] = x^2 + 2x + 4, what is the value of [[3]]?

These functions questions might look intimidating, but they just test your knowledge about how well you can substitute values
[[x]] = x^2 + 2x + 4
[[3]] = 3^2 + 2*3 + 4 = 19. Option D

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