4S^2+4/9S-9

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Solution for 4S^2+4/9S-9 equation: 


S in (-oo:+oo)

4*S^2+(4/9)*S-9 = 0

4*S^2+4/9*S-9 = 0

DELTA = (4/9)^2-(-9*4*4)

DELTA = 11680/81

DELTA > 0

S = ((11680/81)^(1/2)-4/9)/(2*4) or S = (-(11680/81)^(1/2)-4/9)/(2*4)

S = ((11680/81)^(1/2)-4/9)/8 or S = (-((11680/81)^(1/2)+4/9))/8

S in { (-((11680/81)^(1/2)+4/9))/8, ((11680/81)^(1/2)-4/9)/8 }

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