Question

If ( x - 1 ) is a factor of x^4-5x^3+ax^2+5x-k, then a - k=?



please answer me with the process... ​

Answer 1

x = 1

then put x = 1

1 ^4 - 5×1^3 +a×1^2+5×1-k

1 - 5 +1a + 5 -k

1 +1a-1k

1a -1k = -1

a-k = -1

Answer 2

Answer:

happy birthday