(x^2+9x)/(x^2+16x+63)

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Solution for (x^2+9x)/(x^2+16x+63) equation: 


D( x )

x^2+16*x+63 = 0

x^2+16*x+63 = 0

x^2+16*x+63 = 0

x^2+16*x+63 = 0

DELTA = 16^2-(1*4*63)

DELTA = 4

DELTA > 0

x = (4^(1/2)-16)/(1*2) or x = (-4^(1/2)-16)/(1*2)

x = -7 or x = -9

x in (-oo:-9) U (-9:-7) U (-7:+oo)

(x^2+9*x)/(x^2+16*x+63) = 0

x^2+9*x = 0

x*(x+9) = 0

x+9 = 0 // - 9

x = -9

x*(x+9) = 0

x^2+16*x+63 = 0

x^2+16*x+63 = 0

DELTA = 16^2-(1*4*63)

DELTA = 4

DELTA > 0

x = (4^(1/2)-16)/(1*2) or x = (-4^(1/2)-16)/(1*2)

x = -7 or x = -9

(x+9)*(x+7) = 0

(x*(x+9))/((x+9)*(x+7)) = 0

( x+9 )

x+9 = 0 // - 9

x = -9

( x )

x = 0

x in { -9} 

x = 0

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