Question

If x-1 is a factor of p(x) = x² 20x+5k
find k​

Answer 1

if x-1 is factor

then x-1= 0 => x=1

also x² - 20x+5k = 0

substituting x in the equation

1² - 20(1) + 5k = 0

-19 = - 5k

k= 19/5