0.25=(d^2-1.1^2)/d^2

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Solution for 0.25=(d^2-1.1^2)/d^2 equation: 


D( d )

d^2 = 0

d^2 = 0

d^2 = 0

1*d^2 = 0 // : 1

d^2 = 0

d = 0

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

0.25 = (d^2-1.1^2)/(d^2) // - (d^2-1.1^2)/(d^2)

0.25-((d^2-1.1^2)/(d^2)) = 0

(-1*(d^2-1.1^2))/(d^2)+0.25 = 0

(-1*(d^2-1.1^2))/(d^2)+(0.25*d^2)/(d^2) = 0

0.25*d^2-1*(d^2-1.1^2) = 0

1.1^2-0.75*d^2 = 0

(1.1^2-0.75*d^2)/(d^2) = 0

(1.1^2-0.75*d^2)/(d^2) = 0 // * d^2

1.1^2-0.75*d^2 = 0

-0.75*d^2 = -1.1^2 // : -0.75

d^2 = 1.33333333*1.1^2

d^2 = 1.33333333*1.1^2 // ^ 1/2

abs(d) = 1.1*1.33333333^(1/2)

d = 1.1*1.33333333^(1/2) or d = -(1.1*1.33333333^(1/2))

d in { 1.1*1.33333333^(1/2), -(1.1*1.33333333^(1/2)) }

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