If (x+2) is a factor of x^3-6x^2+kx+10, k=

If a polynomial is divisible by , then is a root of this polynomial.
Here (x-a) is equal to x+2:



So -2 is a root of the polynomial. That means x³-6x²+kx+10=0 for x=-2. Now substitute -2 for x in the equation and solve for k:

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