Question

If x-2 is a factor of 5x^2-kx_18, then find the value of k ​

Answer 1

k=1

Step-by-step explanation:

Given,

(x-2) is a factor of 5x²-kx-18, then

5x²-kx-18=0 at x=2

Now,

5(2)²-k(2)-18=0

5×4-2k-18=0

20-2k-18=0

2-2k=0

2k=2

k=1