2/x^2-28/x=0

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Solution for 2/x^2-28/x=0 equation: 


D( x )

x = 0

x^2 = 0

x = 0

x = 0

x^2 = 0

x^2 = 0

1*x^2 = 0 // : 1

x^2 = 0

x = 0

x in (-oo:0) U (0:+oo)

2/(x^2)-(28/x) = 0

2/(x^2)-28*x^-1 = 0

2*x^-2-28*x^-1 = 0

t_1 = x^-1

2*t_1^2-28*t_1^1 = 0

2*t_1^2-28*t_1 = 0

DELTA = (-28)^2-(0*2*4)

DELTA = 784

DELTA > 0

t_1 = (784^(1/2)+28)/(2*2) or t_1 = (28-784^(1/2))/(2*2)

t_1 = 14 or t_1 = 0

t_1 = 0

x^-1+0 = 0

x^-1 = 0

1*x^-1 = 0 // : 1

x^-1 = 0

x należy do O

t_1 = 14

x^-1-14 = 0

1*x^-1 = 14 // : 1

x^-1 = 14

-1 < 0

1/(x^1) = 14 // * x^1

1 = 14*x^1 // : 14

1/14 = x^1

x = 1/14

x = 1/14

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