Question

if 3 is the zero of polyanomial x²+2x-a find a?​

Answer 1

Step-by-step explanation:

(3)2 + 3 × 2 - a = 0

9 + 6 - a = 0

15 - a =0

a = 15

Answer 2

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

P(3) = 9 + 6 - a

0 = 15 -a

-15 = -a

a = 15