1/a+b+c-1/x=1/a+1/b
from quadratic equation
please solve fast
it's urgent
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-1(a+b)/(a+b) = x(a+b+x)/ab
-1=x(a+b+x) / ab
-ab= (a+b)x + x2
so, x2 + (a+b)x +ab = 0
now, A = 1, B=(a+b) C= ab..
so, D = B2 - 4AC
-1(a+b) /x(a+b+x) = a+b/ ab
x-(a+b+x)/x(a+b+x) = a+b/ ab
1/(a+b+x) -1/x = 1/a + 1/b
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