(a^2-5a-50)/(a+3)

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Solution for (a^2-5a-50)/(a+3) equation: 


D( a )

a+3 = 0

a+3 = 0

a+3 = 0

a+3 = 0 // - 3

a = -3

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

(a^2-(5*a)-50)/(a+3) = 0

(a^2-5*a-50)/(a+3) = 0

a^2-5*a-50 = 0

a^2-5*a-50 = 0

DELTA = (-5)^2-(-50*1*4)

DELTA = 225

DELTA > 0

a = (225^(1/2)+5)/(1*2) or a = (5-225^(1/2))/(1*2)

a = 10 or a = -5

(a+5)*(a-10) = 0

((a+5)*(a-10))/(a+3) = 0

( a+5 )

a+5 = 0 // - 5

a = -5

( a-10 )

a-10 = 0 // + 10

a = 10

a in { -5, 10 }

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