Question

помогите решить номер 30.

Answer 1

$(5-\sqrt{26})x<51-10\sqrt{26}\; |:(5-\sqrt{26})<0\\\\x>\frac{51-10\sqrt{26}}{5-\sqrt{26}}\\\\\frac{51-10\sqrt{26}}{5-\sqrt{26}}=\frac{(51-10\sqrt{26})(5+\sqrt{26})}{25-26}=\frac{255+51\sqrt{26}-50\sqrt{26}-260}{-1}=\\\\=-(-5+\sqrt{26})=5-\sqrt{26}\approx 5-5,099=-0,099\\\\x>-0,099\\\\x(naimenshee\; celoe)=0$