Question

If 3 is a zero of polynomial x^4 - 3x^3 - 7x^ 2 + 15x + k . Find ' k '

Answer 1

3 is a zero polynomial

p(3)=0

0 =(3)4-3(3)3-7(3)2+15(3)+k

0=81-81-63+45+k

0=-18+k

k=18

so here is your answer hope it's help you