4(7/9)x^2+7x

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Solution for 4(7/9)x^2+7x equation: 


x in (-oo:+oo)

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

28/9*x^2+7*x = 0

DELTA = 7^2-(0*28/9*4)

DELTA = 49

DELTA > 0

x = (49^(1/2)-7)/(2*28/9) or x = (-49^(1/2)-7)/(2*28/9)

x = 0 or x = -9/4

x in { -9/4, 0 }

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