x² + 10x + 25 - 27 = 0
x² + 10x - 2 = 0
Using quadratic formula:
[tex]x = \frac{-10 +_- \sqrt{100 - 4(-2)}}{2}[/tex]
[tex]= \frac{-10 +_- \sqrt{108}}{2}[/tex]
[tex]= \frac{-10 +_- 6\sqrt{3}}{2}[/tex]
[tex] = -5 +_- 3\sqrt{3}[/tex]
[tex]x = -5 + 3\sqrt{3}[/tex] or [tex]x = -5 - 3\sqrt{3}[/tex]
