Let's simplify the given equation step by step:

7x^2 - 1 - (2x + 1)(3x - 2) = x^2

First, let's expand the expression within the parentheses:

7x^2 - 1 - (6x^2 - 4x + 3x - 2) = x^2

Simplify further:

7x^2 - 1 - (6x^2 - x - 2) = x^2

Distribute the negative sign inside the parentheses:

7x^2 - 1 - 6x^2 + x + 2 = x^2

Combine like terms:

7x^2 - 1 - 6x^2 + x + 2 = x^2
(7x^2 - 6x^2) + (x) + (-1 + 2) = x^2
x^2 + x + 1 = x^2

At this point, we see that the equation doesn't simplify to x^2. It seems there might have been an error in calculation. Let's re-evaluate the steps.