Answer:
x=-4,4,-3,3
Step-by-step explanation:
Factor by the difference of two squares
[tex] {x}^{2} - {y}^{2} = (x + y)(x - y)[/tex]
[tex] {x}^{2} - 16 = (x + 4)(x - 4) \\ {x}^{2} - 9 = (x + 3)( x - 3)[/tex]
[tex](x + 4)(x - 4)(x + 3)(x - 3) = 0[/tex]
Therefore, our answer is x = -4,4,-3,3
