4/5=2.5x^2-2x

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Solution for 4/5=2.5x^2-2x equation: 


x in (-oo:+oo)

4/5 = 2.5*x^2-(2*x) // - 2.5*x^2-(2*x)

2*x-(2.5*x^2)+4/5 = 0

2*x-2.5*x^2+4/5 = 0

2*x-2.5*x^2+4/5 = 0

DELTA = 2^2-(-2.5*4/5*4)

DELTA = 12

DELTA > 0

x = (12^(1/2)-2)/(-2.5*2) or x = (-12^(1/2)-2)/(-2.5*2)

x = (2*3^(1/2)-2)/(-5) or x = (-2*3^(1/2)-2)/(-5)

x in { (2*3^(1/2)-2)/(-5), (-2*3^(1/2)-2)/(-5) }

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