9x2-(2x-3y)2=?
A
(5x-3y)(x+3y)
B
(5x-3y)(x-3y)
C
(5x+3y)(x-3y)
D
কোনোটিই নয়
Correct Answer: (5x-3y)(x+3y)
9x2 - (2x - 3y)2 = (3x)2 - (2x - 3y)2 = (3x + 2x - 3y)(3x - 2x + 3y) = (5x - 3y)(x + 3y)