(X^2+10x+21)/(x+3)

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Solution for (X^2+10x+21)/(x+3) equation: 


D( x )

x+3 = 0

x+3 = 0

x+3 = 0

x+3 = 0 // - 3

x = -3

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

(X^2+10*x+21)/(x+3) = 0

X^2+10*x+21 = 0 // - X^2+21

10*x = -(X^2+21) // : 10

x = (-(X^2+21))/10

x = (-(X^2+21))/10

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