Запиши два таких числа сумма которых равна 12, произведение - 35

$\left \{ {{x+y=12} \atop {xy=35}} \right. \\\left \{ {{y=12-x} \atop {x(12-x)=35}} \right. \\\left \{ {{y=12-x} \atop {12x-x^{2}-35=0 }} \right. \\-x^{2}+12x-35=0\\D=b^{2}-4ac=144-4*(-1)*(-35)=4\\x_{1}=\frac{-12+\sqrt{4} }{-2}=5\\x_{2}=\frac{-12-\sqrt{4} }{-2}=7\\\left \{ {{y_{1}=12-x_{1}} \atop {x_{1}=5}} \right. \\\left \{ {{y_{1}=7} \atop {x_{1}=5}} \right. \\\\\left \{ {{y_{2}=12-x_{2}} \atop {x_{2}=7}} \right. \\\left \{ {{y_{2}=5} \atop {x_{2}=7}} \right. \\$

Ответ: числа 5 и 7.