x^2-12x+36=0

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x^2-12x+36=0x^2-12x+36=0x^2-12x+36=0x^2-12x+36=0(x-6)²=0x1=x2=6(x-6)*(x-6)=0,x=6

x^2-12x+36=0
x^2-12x+36=0

x^2-12x+36=0
x^2-12x+36=0
(x-6)²=0
x1=x2=6

(x-6)*(x-6)=0 , x=6