Question

x-3 is a factor of x^2-kx+30 find k

Answer 1

x-3
x= 3
on putting the value of X in given equation.
(3)² -k(3) +30 =0
9 -3k + 30 =0
-3k =-39
3k = 39
k= 39/3

Answer 2

x-3 is the factor of x²-kx+30=0

Therefore, x=3

Putting value of x in polynomial we get

3²-3k+30=0
9-3k+30=0
39-3k=0
3k=39
k=39/3
k=13

HENCE,the value of k is 13.