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X^3+3x^2+kx-10 and x-1 is a factor what is k
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X^3+3x^2+kx-10 and x-1 is a factor what is k

User Klaus Ertl
by
5.3k points

1 Answer

2 votes

Answer:

6

Explanation:

Using the factor theorem, the expression evaluated at
x=1 will equal
0.


1^3+3(1^2)+k(1)-10=0 \\ \\ 1+3+k-10=0 \\ \\ k=6

User Ennael
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4.7k points
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