3y^2+12y-21/3y

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Solution for 3y^2+12y-21/3y equation: 


y in (-oo:+oo)

3*y^2+12*y-((21/3)*y) = 0

3*y^2+12*y-7*y = 0

3*y^2+5*y = 0

DELTA = 5^2-(0*3*4)

DELTA = 25

DELTA > 0

y = (25^(1/2)-5)/(2*3) or y = (-25^(1/2)-5)/(2*3)

y = 0 or y = -5/3

y in { -5/3, 0 }

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