1.4=0.3x+1/2*4x^2

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Solution for 1.4=0.3x+1/2*4x^2 equation: 


x in (-oo:+oo)

1.4 = 4*(1/2)*x^2+0.3*x // - 4*(1/2)*x^2+0.3*x

1.4-(4*(1/2)*x^2)-(0.3*x) = 0

1.4-2*x^2-0.3*x = 0

1.4-2*x^2-0.3*x = 0

DELTA = (-0.3)^2-(-2*1.4*4)

DELTA = 0.3^2+11.2

DELTA = 11.29

DELTA > 0

x = ((0.3^2+11.2)^(1/2)+0.3)/(-2*2) or x = (0.3-(0.3^2+11.2)^(1/2))/(-2*2)

x = ((0.3^2+11.2)^(1/2)+0.3)/(-4) or x = (0.3-(0.3^2+11.2)^(1/2))/(-4)

x in { ((0.3^2+11.2)^(1/2)+0.3)/(-4), (0.3-(0.3^2+11.2)^(1/2))/(-4) }

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