Answer:
± 11[tex]\sqrt{3}[/tex]
Step-by-step explanation:
Given
x² + 11² = 22², that is
x² + 121 = 484 ( subtract 121 from both sides )
x² = 363 ( take the square root of both sides )
x = ± [tex]\sqrt{363}[/tex] = ± [tex]\sqrt{121(3)}[/tex] = ± 11[tex]\sqrt{3}[/tex]
