Answer:
B
Step-by-step explanation:
[tex]3x^2 - 2x + x(3x-1)-((x+3)-4(x-1))\\3x^2 - 2x + 3x^2 - x - (x + 3 - 4x + 4)\\3x^2 - 2x + 3x^2 - x - x - 3 + 4x - 4\\6x^2 - 7[/tex]
