(a^2-11a+30)/(a-5)

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Solution for (a^2-11a+30)/(a-5) equation: 


D( a )

a-5 = 0

a-5 = 0

a-5 = 0

a-5 = 0 // + 5

a = 5

a in (-oo:5) U (5:+oo)

(a^2-(11*a)+30)/(a-5) = 0

(a^2-11*a+30)/(a-5) = 0

a^2-11*a+30 = 0

a^2-11*a+30 = 0

DELTA = (-11)^2-(1*4*30)

DELTA = 1

DELTA > 0

a = (1^(1/2)+11)/(1*2) or a = (11-1^(1/2))/(1*2)

a = 6 or a = 5

(a-5)*(a-6) = 0

a-6 = 0

a-6 = 0 // + 6

a = 6

a = 6

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