Question

12 x y into 9 x square - 16 y square by 4 x y into 3 X + 4 Y​

Answer 1

$12xy \times (9 {x}^{2} - 16 {y}^{2}) \div 4xy (3x + 4y) \\ 12xy(3x + 4y)(3x - 4y) \div 4xy(3x + 4y) \\ 3(3x - 4y)$