[tex]5{x}^{2}-26=0\\5{x}^{2}=26\\{x}^{2}= \frac{26}{5}\\\sqrt{{x}^{2}}= \pm \sqrt{\frac{26}{5}}\\\\x'= + \sqrt{\frac{26}{5}} \approx 2,280\\x''=- \sqrt{\frac{26}{5}} \approx -2,280\\[/tex]
