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x^2-12x+11=0
(x-11)(x-1)=0
x-11=0. y. x-1=0
x=11. y. x=1
dos soluciones
x=11
x=1
prueba
x=1
x^2-12x+11=0
(1)^2-12(1)+11=0
1-12+11=0
12-12=0
0=0
saludos
-11x
- 1x
————
-12x
[-11*-1]=11
entonces
x=1. x=11.