Question

If one zero of polynomial x^2-5x-k is 5,then the value of k is?​

Answer 1

Answer:

0

Step-by-step explanation:

f(x)=x²-5x-k

If 5 is a zero of the polynomial, then f(5) should be equal to 0

f(5)=(5)²-5(5)-k

0=25-25-k

0=0-k

k=0