MCQ
The factorization of 9x2 - 3x - 20 is:
- A(3x - 4) (3x - 5)
- B(3x + 4) (3x - 5)
- C(3x + 4) (3x + 5)
- D(3x - 4) (3x + 5)
✓
Answer
- (3x + 4) (3x - 5)
Solution:
9x2 - 3x - 20
= 9x2 - 15x + 12x - 20
= 3x(3x - 5) + 4(3x - 5)
= (3x + 4) (3x - 5)
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