2/5p-5/2p^2

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Solution for 2/5p-5/2p^2 equation: 


p in (-oo:+oo)

(2/5)*p-((5/2)*p^2) = 0

(-5/2)*p^2+(2/5)*p = 0

2/5*p-5/2*p^2 = 0

DELTA = (2/5)^2-(-5/2*0*4)

DELTA = 4/25

DELTA > 0

p = ((4/25)^(1/2)-2/5)/(-5/2*2) or p = (-(4/25)^(1/2)-2/5)/(-5/2*2)

p = 0 or p = 4/25

p in { 0, 4/25 }

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