Question

if 3 is a zero of a polynomial x2+2x-a,then the value of a= a)1/5 b) 15 c) -15 d) -1/15​

Answer 1

Answer:

a=15

Step-by-step explanation:

x=3

Then,

p(x)= x square +2(x)-a

p(3)=(3) square +2(3)-a

=9+6-a

=15-a

a=15