Question

If 3 is a zero of the polynomial
x² + 2x-a
Find a​

Answer 1

$\huge \star \underline \pink{AnsWeR}$

x2+2x-a

3²+2(3)-a=0

9+6-a=0

15=a

Answer 2

Answer:

The value of a is 15.

Step-by-step explanation:

Here, f (x) = x^2 + 2x - a

3 is the Zero of the Polynomial f (x), then f (3) = 0. (Equate the whole Polynomial to 0)

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

= 9 + 6 - a = 0

= 15 - a = 0

=> a = 15

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