2/7x^2+9/7x=0

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Solution for 2/7x^2+9/7x=0 equation: 


x in (-oo:+oo)

(2/7)*x^2+(9/7)*x = 0

2/7*x^2+9/7*x = 0

DELTA = (9/7)^2-(0*2/7*4)

DELTA = 81/49

DELTA > 0

x = ((81/49)^(1/2)-9/7)/(2/7*2) or x = (-(81/49)^(1/2)-9/7)/(2/7*2)

x = 0 or x = -9/2

x in { -9/2, 0 }

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