Respuesta:
:-)
Explicación paso a paso:
[tex]x^2\:+\:6x\:+\:8\:=\:25\\\\x^2+6x+8-25=0\\\\x^2+6x-17=0\\\\Resolver\ con\ la\ formula\ general\ para\ ecuaciones\ de\ segundo\ grado\ :\\\\x_{1,\:2}=\frac{-6\pm \sqrt{6^2-4\cdot \:1\cdot \left(-17\right)}}{2\cdot \:1}\\\\x_{1,\:2}=\frac{-6\pm \:2\sqrt{26}}{2\cdot \:1}\\\\x_1=\frac{-6+2\sqrt{26}}{2\cdot \:1},\:x_2=\frac{-6-2\sqrt{26}}{2\cdot \:1}\\\\\\x= -3+\sqrt{26},\:x=-3-\sqrt{26}[/tex]
