Answer:
x = -9, 9
Step-by-step explanation:
x^2 - 106 = -25
Add 106 to each side
x^2 - 106+106 = -25+106
x^2 = 81
Take the square root of each side
sqrt(x^2) = sqrt(81)
x = ±9
[tex]x=9,\:x=-9[/tex]
[tex]x^2-106=-25[/tex]
[tex]x^2-106+106=-25+106[/tex]
[tex]x^2=81[/tex]
[tex]x=\sqrt{81},\:x=-\sqrt{81}[/tex]
[tex]\sqrt{81}=9[/tex]
[tex]-\sqrt{81}=-9[/tex]
