Respuesta:
:-)
Explicación paso a paso:
[tex]factorizar\:x^2\:-\:7x\:+\:12\:=\:0\\\\x_{1,\:2}=\frac{-\left(-7\right)\pm \sqrt{\left(-7\right)^2-4\cdot \:1\cdot \:12}}{2\cdot \:1}\\\\x_{1,\:2}=\frac{-\left(-7\right)\pm \:1}{2\cdot \:1}\\\\x_1=\frac{-\left(-7\right)+1}{2\cdot \:1},\:x_2=\frac{-\left(-7\right)-1}{2\cdot \:1}\\\\\\x=4,\:x=3[/tex]
