Question

If equation x2 + kx + 5 = 0, has one roots 4 then find the value of k​

Answer 1

Step-by-step explanation:

x²+kx+5=0

product of root =5/2

(x) (4)=5/2

x=5/8

Answer 2

Answer:

Given,

f(x)=x²+kx+5

one of the roots is 4

so, f(4)=0

(4)²+k(4)+5=0

16+4k+5=0

4k=-21

k= -21/4