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1. 9x2 - (2x - 3y) = ?
- A. (5x - 3y)(x + 3y)
- B. (5x - 3y)(x + 3y)
- C. (5x - 3y)(x + 3y)
- D. (5x - 3y)(x + 3y)
Answer: Option A
Explanation:
9x2 - (2x - 3y)2
= (3x)2 - (2x - 3y)2
= (3x + 2x - 3y)(3x - 2x + 3y)
= (5x - 3y)(x + 3y)
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