Answer :
[tex]x^2-45=0[/tex]
Add 45 to both sides of the equation:
[tex]x^2-45+45=45[/tex][tex]x^2=45[/tex]Apply square root to both sides:
[tex]x=\sqrt[]{45}[/tex]Add 45 to both sides of the equation:
[tex]x^2-45+45=45[/tex][tex]x^2=45[/tex]Apply square root to both sides:
[tex]x=\sqrt[]{45}[/tex]