Question

Simplify: (3x – 1) (x3 + 2x + 1)

o A. 3x4 + 6x2 + 2 - 1
O B. 3x4 – 23 + 6x2 + x – 1
C. 2x3 + 6x2 + x +1
O D. 3x4 + 203 + 6x2 + 1

Answer 1

`3x^4-x^3+6x^2+x-1`

Explanation:

Distribute parentheses:

`3xx^3 + 3x * 2x + 3x * 1 + (-1)x^3 + (-1) * 2x + (-1) * 1`

Add minus and plus rules:

`3x^3x + 3 * 2xx + 3 * 1 * x - 1 * x^3 - 1 * 2x - 1 * 1`

Simplify:

`3x^4-x^3+6x^2+x-1`

Answer 2

B: 3x4-x3+6x2+x-1