Question

if x-3is a factor of x2+kx+9 find the value of k

Answer 1

by factor theorem 3 is zero of x2+kx+9 .
then on solving ,you will find k= -6

Answer 2

x=3
3^2+k3+9
9+3k+9=0
3k=-18
k=-18/3
k=-6
i hope this help u
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