Answer:
The answer is the second option
Step-by-step explanation:
Let u=x^2.
[tex]( {x}^{2} ) {}^{2} - 9( {x}^{2} ) + 8( {x}^{2} ) {}^{0} [/tex]
[tex] {u}^{2} - 9u + 8[/tex]
[tex](u - 1)(u - 8)[/tex]
[tex]u = 1[/tex]
[tex]u = 8[/tex]
Set this equal to x^2
[tex] {x}^{2} = 1[/tex]
[tex]x = 1[/tex]
or
[tex]x = - 1[/tex]
[tex] {x}^{2} = 8[/tex]
[tex]x = 2 \sqrt{2} [/tex]
or
[tex]x = - 2 \sqrt{2} [/tex]
