Question

if 3 is a zero of the polynomial p(x)=X2+2x-a, then find 'a'.​

Answer 1

Answer:

a = 15

Step-by-step explanation:

(x)2+ 2(x) - a = 0

put x = 3

(3)^2 + 2(3) - a = 0

9+6 - a = 0

15 - a = 0

-a = 0 - 15

-a = -15

a have negative sign then change sign from both side

a = 15