Respuesta :

Tucon

 

[tex]\displaystyle\bf\\\\x_1=-10~~and~~x_2=3\\\\(x-x_1)(x-x_2)=0\\\\(x-(-10))(x-3)=0\\\\(x+10)(x-3)=0\\\\x^2+10x-3x -30=0\\\\\boxed{\bf x^2+7x - 30=0}[/tex]