z/z+7=2z/5z-1

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Solution for z/z+7=2z/5z-1 equation: 


D( z )

z = 0

z = 0

z = 0

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

z/z+7 = ((2*z)/5)*z-1 // - ((2*z)/5)*z-1

z/z-(((2*z)/5)*z)+1+7 = 0

(-2/5)*z^2+z/z+1+7 = 0

-2/5*z^2 = -9 // : -2/5

z^2 = 45/2

z^2 = 45/2 // ^ 1/2

abs(z) = (45/2)^(1/2)

z = (45/2)^(1/2) or z = -(45/2)^(1/2)

z in { (45/2)^(1/2), -(45/2)^(1/2) }

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