Answers

2016-02-18T17:20:04+05:30
1/(a+b+x)=1/a+1/b+1/x1/(a+b+x) - 1/x=1/a+1/b
(x - a - b - x)/x(a+b + x)   = (a + b )/ab
  Let a+ b + x = k


-1(a+b)/x(a + b + x)   = a + b/ab

-1/x(a + b + x)   =1/ab

x(a + b + x) = -ab

ax + bx + x^2  + ab = 0

x^2  + ax + bx +  ab = 0

x^2  - (-a -b)x +  ab = 0

 \alpha  +  \beta  = -a-b

 \alpha  \beta  = ab

 \alpha  = -a
 \beta = -b




Therefore x = -a,-b

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