y=(y*y)/7

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Solution for y=(y*y)/7 equation: 


y in (-oo:+oo)

y = (y*y)/7 // - (y*y)/7

y-((y*y)/7) = 0

(-1/7)*y^2+y = 0

y-1/7*y^2 = 0

DELTA = 1^2-(-1/7*0*4)

DELTA = 1

DELTA > 0

y = (1^(1/2)-1)/(-1/7*2) or y = (-1^(1/2)-1)/(-1/7*2)

y = 0 or y = 7

y in { 0, 7 }

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