Reciprocal value

How do I calculate a number x that is 9 greater than its reciprocal (1/x)?

Correct result:

x1 =  9.10977
x2 =  -0.10977

Solution:

x=9+1/x x2=9x+1  x2=9x+1  x2−9x−1=0  a=1;b=−9;c=−1 D=b2−4ac=92−4⋅1⋅(−1)=85 D>0  x1,2=−b±D2a=9±852 x1,2=4.5±4.60977222865 x1=9.10977222865=9.10977 x2=−0.109772228646   Factored form of the equation:  (x−9.10977222865)(x+0.109772228646)=0

Our quadratic equation calculator calculates it.

x2=(−0.1098)=−0.10977

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