Quartic Equation Formula - Polynomial Equation Solver

Quartic Equation Formula:

Quartic Equation : ax4 + bx3 + cx2 + dx + e = 0
NOTE : Let p and q be the square root of any 2 non-zero roots.
p = sqrt(y1)
q = sqrt(y3)
r = -g / (8pq)
s = b / (4a)
x1 = p + q + r - s
x2 = p - q - r - s
x3> = -p + q - r - s
x4 = -p - q + r - s

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