1/7y^2-11/28y=3/28

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Solution for 1/7y^2-11/28y=3/28 equation: 


y in (-oo:+oo)

(1/7)*y^2-((11/28)*y) = 3/28 // - 3/28

(1/7)*y^2-((11/28)*y)-(3/28) = 0

(1/7)*y^2+(-11/28)*y-3/28 = 0

1/7*y^2-11/28*y-3/28 = 0

DELTA = (-11/28)^2-(-3/28*1/7*4)

DELTA = 169/784

DELTA > 0

y = ((169/784)^(1/2)+11/28)/(1/7*2) or y = (11/28-(169/784)^(1/2))/(1/7*2)

y = 3 or y = -1/4

y in { -1/4, 3 }

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