Question

if one zero of the polynomial x^2+a is-3 then find its other zeros​

Answer 1

Answer:

put x=-3

then

9+a=0

a=-9

then

x^2-9=0

x=√9

x==3, -3

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Answer 2

Answer:

3, shorter method below

Step-by-step explanation:

Relation between coefficient and roots -

Sum of roots for ax²+bx+c=0 is -b/a.

Sum of roots is 0 in the polynomial.

Therefore, the other root must be 3.