16/25x^2+2x=9

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Solution for 16/25x^2+2x=9 equation: 


x in (-oo:+oo)

(16/25)*x^2+2*x = 9 // - 9

(16/25)*x^2+2*x-9 = 0

16/25*x^2+2*x-9 = 0

DELTA = 2^2-(-9*16/25*4)

DELTA = 676/25

DELTA > 0

x = ((676/25)^(1/2)-2)/(16/25*2) or x = (-(676/25)^(1/2)-2)/(16/25*2)

x = 5/2 or x = -45/8

x in { -45/8, 5/2 }

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