ANSWER
A) -16
EXPLANATION
The given equation is
[tex] {x}^{2} - 8 = 8[/tex]
Isolate the constant terms:
[tex] {x}^{2} = 8 + 8[/tex]
Simplify
[tex] {x}^{2} = 16[/tex]
Take square root
[tex]x = \pm \: \sqrt{16} [/tex]
[tex]x = \pm \: 4[/tex]
Split the plus or minus sign
[tex]x = - 4 \: or \: x = 4[/tex]
The product is
[tex] - 4 \times 4 = - 16[/tex]
