(x-11)^{2} <<img src="https://tex.z-dn.net/?f=+%5Csqrt%7B5%7D+" id="TexFormula1" title=" \sqrt{5} " alt=" \sqrt{5} " align="absmiddle" class="latex-formula">*(x-11)
(x-11)² < √5 (x-11)<br>(x-11)² - √5(x-11) <0<br>(x-11)(x-11-√5) <0<br>x=11 x=11+√5 + - + ---------- 11 ------------ 11+√5 -------------- \\\\\\\\\\\\\\\\\\\\\\\\ x∈(11; 11+√5)