(9)/(x^2+18x+81)+(8)/(x^2+2x-63)

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Solution for (9)/(x^2+18x+81)+(8)/(x^2+2x-63) equation: 


D( x )

x^2+18*x+81 = 0

x^2+2*x-63 = 0

x^2+18*x+81 = 0

x^2+18*x+81 = 0

x^2+18*x+81 = 0

DELTA = 18^2-(1*4*81)

DELTA = 0

x = -18/(1*2)

x = -9 or x = -9

x^2+2*x-63 = 0

x^2+2*x-63 = 0

x^2+2*x-63 = 0

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

DELTA = 256

DELTA > 0

x = (256^(1/2)-2)/(1*2) or x = (-256^(1/2)-2)/(1*2)

x = 7 or x = -9

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

9/(x^2+18*x+81)+8/(x^2+2*x-63) = 0

x^2+18*x+81 = 0

x^2+18*x+81 = 0

x^2+18*x+81 = 0

DELTA = 18^2-(1*4*81)

DELTA = 0

x = -18/(1*2)

x = -9 or x = -9

(x+9)^2 = 0

x^2+2*x-63 = 0

x^2+2*x-63 = 0

x^2+2*x-63 = 0

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

DELTA = 256

DELTA > 0

x = (256^(1/2)-2)/(1*2) or x = (-256^(1/2)-2)/(1*2)

x = 7 or x = -9

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

9/((x+9)^2)+8/((x+9)*(x-7)) = 0

9/((x+9)^2)+(8*(x+9))/((x+9)^2) = 0

8*(x+9)+9 = 0

8*x+81 = 0

(8*x+81)/((x+9)^2) = 0

(8*x+81)/((x+9)^2) = 0 // * (x+9)^2

8*x+81 = 0

8*x+81 = 0 // - 81

8*x = -81 // : 8

x = -81/8

x = -81/8

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