Question 305451
x^2-2x-13=0
x^2-2x   =13
x^2-2x+1=14 completing the square.
(x-1)^2=14
x-1=+-sqrt(14)
x=1+sqrt(14), x=1-sqrt(14)
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Ed
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*[invoke quadratic "x", 1, -2, -13]