akar akar persamaan kuadrat 2x²-2x-1=0 adalah...

rumus ABC
X = -b ± √ b²-4ac / 2a
= -(-2) ± √(-2)²-4(2)(-1) / 2(2)
=2±√4+8 / 4
=2± √12 / 4
=2±2√3 / 4
= ½±½√3
X1 = ½+½√3
X2=½-½√3