Simplify the expression \(3x^2 - 2x + 1 - (2x^2 - x + 2)\)

Step 1 ：First, distribute the negative sign to each term inside the parentheses: \(3x^2 - 2x + 1 - 2x^2 + x - 2\)

Step 2 ：Next, combine like terms: \((3x^2 - 2x^2) + (-2x + x) + (1 - 2)\)

Step 3 ：This simplifies to: \(x^2 - x - 1\)