Question

if 3 is a zero of the polynomial x square +2x -a . find a​

Answer 1

Answer:

Given that

3 is zero of polynomial x square + 2x - a

Now, In the place of x we have to write 3

x square + 2x - a = 0

3×3 + 2(3)-a=0

9+6-a=0

15 = a

Therefore,a = 15