Question

If (x+5) is a factor of p(x) =x³-20x+5k then k=? *​

Answer 1

Answer:

k=5 by finding p(-5) =0

Answer 2

Answer:

Here, the value of k=5.

Step-by-step explanation:

Here, As given in question,

x+5 is a factor of it

So, x+5=0

=x=-5

Now, put the value of x in the given polynomial,

=x^3-20x+5k=0

=(-5)^3-20(-5)+5k=0

=(-125)-(-100)+5k=0

=(-125)+100+5k=0

=(-25)+5k=0

=5k=25

=k=25/5

=k=5 (Answer)

Thank you.