SOLUTION: Find the value of k if the given equation is true for x=5 x^4-x-^3-8x^2-kx-k=0

Algebra ->  Test  -> Lessons -> SOLUTION: Find the value of k if the given equation is true for x=5 x^4-x-^3-8x^2-kx-k=0      Log On


   

Question 639291: Find the value of k if the given equation is true for x=5
x^4-x-^3-8x^2-kx-k=0
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

Find the value of k if the given equation is true for x=5

x%5E4-x%5E3-8x%5E2-kx-k=0......plug in x=5

5%5E4-5%5E3-8%2A5%5E2-k%2A5-k=0
625-125-8%2A25-5k-k=0
500-200-6k=0
300=6k
300%2F6=k
50=k