1 . x3-1,x3+1,x4+x2+1

• A. $x^7-1$
• B. $x^7-1$
• C. $x^6-1$
• D. $x^5-1$

Answer: Option C

Explanation:

2 . x4+x2+1

• A. $x^2-x+1$
• B. $x^3+1$
• C. $x+1$
• D. $x^2+x+1$

Answer: Option A

Explanation:

3 . x3-1, x3+1, x4+x2+1

• A. $\left(x-4\right)$
• B. $x^6-1$
• C. $\left(x-2\right)$
• D. $\left(x-3\right)$

Answer: Option B

Explanation:

4 . x4+x2+1

• A. $\left(x^2+x+1\right)\left(x^2+x-1\right)$
• B. $\left(x^2-x+1\right)\left(x^2+x-1\right)$
• C. $\left(x^2+x+1\right)\left(x^2-x+1\right)$
• D. $\left(x^2+x+1\right)\left(x+x+1\right)$

Answer: Option C

Explanation: