64-(x+3)^2=0
64-(x^2+6x+9)=0
64-x^2-6x-9=0
-x^2 - 6x + 55 = 0 | * (-1)
x^2 +6x - 55 = 0
x1=5
x2= -11
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64-(x+3)^2=0
64-(x^2+6x+9)=0
64-x^2-6x-9=0
-x^2 - 6x + 55 = 0 | * (-1)
x^2 +6x - 55 = 0
x1=5
x2= -11