4x^2-7x/9-x

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Solution for 4x^2-7x/9-x equation: 


x in (-oo:+oo)

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

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

4*x^2-16/9*x = 0

DELTA = (-16/9)^2-(0*4*4)

DELTA = 256/81

DELTA > 0

x = ((256/81)^(1/2)+16/9)/(2*4) or x = (16/9-(256/81)^(1/2))/(2*4)

x = 4/9 or x = 0

x in { 0, 4/9 }

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