2/21x-4/15x^2

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Solution for 2/21x-4/15x^2 equation: 


x in (-oo:+oo)

(2/21)*x-((4/15)*x^2) = 0

(-4/15)*x^2+(2/21)*x = 0

2/21*x-4/15*x^2 = 0

DELTA = (2/21)^2-(-4/15*0*4)

DELTA = 4/441

DELTA > 0

x = ((4/441)^(1/2)-2/21)/(-4/15*2) or x = (-(4/441)^(1/2)-2/21)/(-4/15*2)

x = 0 or x = 5/14

x in { 0, 5/14 }

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