Question

помогите решить номер 30.

Answer 1

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