Question:
Expand: (2x – 3)²
विस्तार करें: (2x – 3)²
Options:
- a) 4x² + 12x + 9
- b) 4x² – 12x + 9
- c) 4x² – 14x + 10
- d) 4x² + 10x + 9
- a) 4x² + 12x + 9
- b) 4x² – 12x + 9
- c) 4x² – 14x + 10
- d) 4x² + 10x + 9
correct answer : b)
Explanation:
(a – b)² = a² – 2ab + b² => 4x² – 12x + 9.
(a – b)² = a² – 2ab + b² => 4x² – 12x + 9.