(2/7)*w^2-((3/7)*w)-7=0

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Solution for (2/7)*w^2-((3/7)*w)-7=0 equation: 


w in (-oo:+oo)

(2/7)*w^2-((3/7)*w)-7 = 0

(2/7)*w^2+(-3/7)*w-7 = 0

2/7*w^2-3/7*w-7 = 0

DELTA = (-3/7)^2-(-7*2/7*4)

DELTA = 401/49

DELTA > 0

w = ((401/49)^(1/2)+3/7)/(2/7*2) or w = (3/7-(401/49)^(1/2))/(2/7*2)

w = 7/4*((401/49)^(1/2)+3/7) or w = 7/4*(3/7-(401/49)^(1/2))

w in { 7/4*(3/7-(401/49)^(1/2)), 7/4*((401/49)^(1/2)+3/7) }

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