(2b-2)/(2b^2-8)

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Solution for (2b-2)/(2b^2-8) equation: 


D( b )

2*b^2-8 = 0

2*b^2-8 = 0

2*b^2-8 = 0

2*b^2 = 8 // : 2

b^2 = 4

b^2 = 4 // ^ 1/2

abs(b) = 2

b = 2 or b = -2

b in (-oo:-2) U (-2:2) U (2:+oo)

(2*b-2)/(2*b^2-8) = 0

2*b-2 = 0 // + 2

2*b = 2 // : 2

b = 2/2

b = 1

b = 1

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