Question

if 3is zero of polynomial xsquare +2x-a then find a? ​

Answer 1

Answer:

Here is your answer

Step-by-step explanation:

Answer 2

the polynomial = x^2 + 2x - a

the zero = 3

0 = x^2 + 2x - a

x = 3

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

0 = 9 +6 - a

0 = 15 - a

-15 = -a

a = 15