Question

Solve my problem please please please

Answer 1

Answer:

${x}^{2} - 4 \\ = {x}^{2} - {2}^{2} \\ = (x + 2)(x - 2) \\ \\ {x}^{2} - 9 {y}^{2} \\ = {x}^{2} - {(3y)}^{2} \\ = (x + 3y)(x - 3y) \\ \\ \\ 25 {a}^{2} - 36 {b}^{2} \\ = {(5a)}^{2} - {(6b)}^{2} \\ = (5a + 6b)(5a - 6b) \\ \\ \\ 144 - {x}^{2} {y}^{2} \\ = {12}^{2} - {(xy)}^{2} \\ = (12 + xy)(12 - xy)$