Answer:
x²+2x=1. x²+2x-1=0
-b±√b²-4ac
2a
-2±√(2)²-4(1)(-1)
-2±√4-(-4)
2
-2±√8
-2±2√2
-2+2√2. or -2-2√2
2 2
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Answer:
x²+2x=1. x²+2x-1=0
-b±√b²-4ac
2a
-2±√(2)²-4(1)(-1)
2a
-2±√4-(-4)
2
-2±√8
2
-2±2√2
2
-2+2√2. or -2-2√2
2 2