MCQ
x + 1 is a factor of the polynomial.
- Ax3 - 2x2 + x + 2
- Bx3 + 2x2 + x - 2
- Cx3 + 2x2 - x - 2
- Dx3 + 2x2 - x + 2
✓
Answer
- x3 + 2x2 - x - 2
Solution:
x3 + 2x2 - x - 2
= x2 (x + 2) - 1(x + 2)
= (x2 - 1) (x + 2)
= (x + 1) (x - 1) (x + 2)
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