Question

IF x-2 is a factor of 5x - kx - 18, then find the value of k.​

Answer 1

Step-by-step explanation:

let g (x) = 0

x-2 = 0

x=2

now,

if x=2 is factor of above equation

f (2) = 5 x 2 - k x2 - 18

0 = 10 - 18 - k x 2  

-8 /2 = -k

-4 = -k

k = 4

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Answer 2

Answer:

k=-2

Step-by-step explanation:

f (x)=5x-kx-18

x-2=0

x=2

f (2)=5×2-k×2-18

=10-2k-18

=-8-2k

8=-2k

8/-2=k

k=-4