Answer:
[tex]3x^4-x^3+6x^2+x-1[/tex]
Step-by-step explanation:
Distribute parentheses:
[tex]3xx^3 + 3x * 2x + 3x * 1 + (-1)x^3 + (-1) * 2x + (-1) * 1[/tex]
Add minus and plus rules:
[tex]3x^3x + 3 * 2xx + 3 * 1 * x - 1 * x^3 - 1 * 2x - 1 * 1[/tex]
Simplify:
[tex]3x^4-x^3+6x^2+x-1[/tex]
