SOLUTION: it is given that k is a root of quadratic equation x2+x+c = 0 Find the other root of equation

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Question 1047804: it is given that k is a root of quadratic equation x2+x+c = 0
Find the other root of equation
Answer by ikleyn(52778) About Me  (Show Source):
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it is given that k is a root of quadratic equation x2+x+c = 0
Find the other root of equation
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If k and p are the roots, then

k + p = -1     (the coefficient at x with the opposite sign).

Hence, the other root is p = -1-k.

Another solution: 

If k and p are the roots, then

k*p = c     (the constant term).

Hence, the other root is p = c%2Fk.  (If "k" is not zero !)