(5b^2-15)/(b-3)

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Solution for (5b^2-15)/(b-3) equation: 


D( b )

b-3 = 0

b-3 = 0

b-3 = 0

b-3 = 0 // + 3

b = 3

b in (-oo:3) U (3:+oo)

(5*b^2-15)/(b-3) = 0

5*b^2 = 15 // : 5

b^2 = 3

b^2 = 3 // ^ 1/2

abs(b) = 3^(1/2)

b = 3^(1/2) or b = -3^(1/2)

b in { 3^(1/2), -3^(1/2) }

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