Question

Luca needs to solve the equation x2−2x+2=0 by completing the square. Which pair of steps is the most efficient way to begin?

Answer 1

X2-2x=-2
(x-1)^2+1=-2
(x-1)^2=-3
x-1=isqrt3
x=1(+/-)isqrt3
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Answer 2

Answer:

^2−2=−2

^2−2+1=−2+1

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