Question 173144
finding the x intercepts.
y = x^2 + 4x -1
x^2 + 4x -1 = 0

x = [-4 +- sqrt(16 - 4*1*-1)]/2

x = [-4 +- sqrt(20)]/2

x = [-4 +-2sqrt(5)]/2

x = [-2 +-sqrt(5)]
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Cheers,
Stan H.