Question 915359
k is not found in the expression or its given binomial factor.  You might be able to find the other binomial factor either through factorization, or through polynomial division.   I mentally see a "8" and a "7".


{{{(x^2+x-56)/(x+7)=((x-7)(x+8))/(x+7)}}}


{{{x+7}}} is not a factor of {{{x^2+x-56}}}.