Jawabanmu

Jawaban paling cerdas!
2014-03-25T00:03:12+07:00
 x^{2} -2x-4 = 0

 X_{1} + X_{2} =  -\frac{b}{a}
X_{1} + X_{2} = -\frac{(-2)}{1} = 2

X_{1}X_{2} =  \frac{c}{a}
X_{1}X_{2} = -4

 \frac{1}{ X_{1}+1 } +   \frac{1}{ X_{2}+1 } =   \frac{X_{1} + X_{2}  +2}{(X_{1}X_{2})+(X_{1}+X_{2}) + 1}
 \frac{1}{ X_{1}+1 } +   \frac{1}{ X_{2}+1 } =  \frac{2 +2}{(-4)+(2) + 1}
 =  \frac{4}{-1}
= -4

semoga membantu :) jadikan yang terbaik ya :))
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