Answer:
3x^4-x^3+6x^2+7x-3
Step-by-step explanation:
(x^2-x+3)(3x^2+2x-1)
3x^4-3x^3+9x^2+2x^3-2x^2+6x-x^2+x-3
3x^4-3x^3+2x^3+9x^2-2x^2-x^2+6x+x-3
