2/15x-4/21x^2

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


x in (-oo:+oo)

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

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

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

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

DELTA = 4/225

DELTA > 0

x = ((4/225)^(1/2)-2/15)/(-4/21*2) or x = (-(4/225)^(1/2)-2/15)/(-4/21*2)

x = 0 or x = 7/10

x in { 0, 7/10 }

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