ax2+bx+c=0
D=b² - 4ac
5x² - 2x - 1=0
D=b²-4ac = 2² - 4*5*(-1) = 4 + 20 = 24
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ax2+bx+c=0
D=b² - 4ac
5x² - 2x - 1=0
D=b²-4ac = 2² - 4*5*(-1) = 4 + 20 = 24