SOLUTION: find the missing root if 8 is a root of x^2+16x+c=0 I tried the sum formula which is -b/ a so i took -16/1 and got

SOLUTION: find the missing root if 8 is a root of x^2+16x+c=0 I tried the sum formula which is -b/ a so i took -16/1 and got - 16 for my answer which was not right

Question 702893: find the missing root if 8 is a root of x^2+16x+c=0
I tried the sum formula which is -b/ a so i took -16/1 and got - 16 for my answer which was not right
Answer by mouk(232) (Show Source): You can put this solution on YOUR website!
you are nearly correct:

Using the formula for the sum of roots:

gives:

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