Simplify: 2x2−(x2−3x+1)2x^2 - (x^2 - 3x + 1)2x2−(x2−3x+1).
x2+3x−1x^2 + 3x - 1x2+3x−1
x2−3x+1x^2 - 3x + 1x2−3x+1
3x2−3x+13x^2 - 3x + 13x2−3x+1
x2+3x+1x^2 + 3x + 1x2+3x+1