Question

(2xy + 3z) (2xy - - 3z)

Answer 1

Answer:

$(2xy + 3z)(2xy - 3z) \\ = {(2xy)}^{2} - {(3z)}^{2} \\ = 4 {x}^{2} {y}^{2} - 9 {z}^{2}$

Answer 2

Answer:

this is correct..............................