(b^2+11b+18)/(b+2)

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Solution for (b^2+11b+18)/(b+2) equation: 


D( b )

b+2 = 0

b+2 = 0

b+2 = 0

b+2 = 0 // - 2

b = -2

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

(b^2+11*b+18)/(b+2) = 0

b^2+11*b+18 = 0

b^2+11*b+18 = 0

DELTA = 11^2-(1*4*18)

DELTA = 49

DELTA > 0

b = (49^(1/2)-11)/(1*2) or b = (-49^(1/2)-11)/(1*2)

b = -2 or b = -9

(b+9)*(b+2) = 0

b+9 = 0

b+9 = 0 // - 9

b = -9

b = -9

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