x²-2x=3 solve by completing the square
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x²-2x=3 solve by completing the square
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Answer:
x²-2x=3
x²-2x+1=3+1
x²-2x+1=4
(x-1)²= 4
x-1= √4
x-1= +2
x= +2+1
x= 3
x-1= -2
x= -2+1
x= -1
so x is -1≤ x ≥3