Answer :
[tex] x^{2} - 4 = 45[/tex]
[tex] x^{2} [/tex] = 45 + 4
[tex] x^{2} [/tex] = 49
[tex] \sqrt{ x^{2} } = \sqrt{49} [/tex]
x = 7
[tex] x^{2} [/tex] = 45 + 4
[tex] x^{2} [/tex] = 49
[tex] \sqrt{ x^{2} } = \sqrt{49} [/tex]
x = 7