MCQ
$1-x^9=(1-x)\left(1+x+x^2\right)$ _________
- A$\left(1-x^3+x^6\right)$
- ✓$\left(1+x^3+x^6\right)$
- C$\left(1-x^3-x^6\right)$
- D$\left(1+x^3-x^6\right)$
✓
Answer
Correct option: B.
$\left(1+x^3+x^6\right)$
B
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