7x^2-(5x)/8

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Solution for 7x^2-(5x)/8 equation: 


x in (-oo:+oo)

7*x^2-((5*x)/8) = 0

7*x^2+(-5/8)*x = 0

7*x^2-5/8*x = 0

DELTA = (-5/8)^2-(0*4*7)

DELTA = 25/64

DELTA > 0

x = ((25/64)^(1/2)+5/8)/(2*7) or x = (5/8-(25/64)^(1/2))/(2*7)

x = 5/56 or x = 0

x in { 0, 5/56 }

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