2/5w^2+7/5w-4/5=0

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Solution for 2/5w^2+7/5w-4/5=0 equation: 


w in (-oo:+oo)

(2/5)*w^2+(7/5)*w-(4/5) = 0

(2/5)*w^2+(7/5)*w-4/5 = 0

2/5*w^2+7/5*w-4/5 = 0

DELTA = (7/5)^2-(-4/5*2/5*4)

DELTA = 81/25

DELTA > 0

w = ((81/25)^(1/2)-7/5)/(2/5*2) or w = (-(81/25)^(1/2)-7/5)/(2/5*2)

w = 1/2 or w = -4

w in { -4, 1/2 }

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