(r^2+12r+36r)/(r+9)

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Solution for (r^2+12r+36r)/(r+9) equation: 


D( r )

r+9 = 0

r+9 = 0

r+9 = 0

r+9 = 0 // - 9

r = -9

r in (-oo:-9) U (-9:+oo)

(r^2+12*r+36*r)/(r+9) = 0

(r^2+48*r)/(r+9) = 0

r^2+48*r = 0

r*(r+48) = 0

r+48 = 0 // - 48

r = -48

r*(r+48) = 0

(r*(r+48))/(r+9) = 0

( r+48 )

r+48 = 0 // - 48

r = -48

( r )

r = 0

r in { -48, 0 }

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