Question

If 3 is zero of the polynomial xsquare+2x-a . find the value of a .​

Answer 1

Answer:

15 = a. Now, The polynomial is x² + 2x - 15 . x = -5 , x = 3 . Therefore, the other zero is -5 .

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Given :-

3 is zero of the polynomial x²+2x-a

To find :-

Find the value of a ?

Solution :-

Given quadratic polynomial is

P(x) = x²+2x-a

Given zero = 3

We know that

If 3 is a zero then it must satisfies the given polynomial.i.e.p(3) = 0

=> 3²+2(3)-a = 0

=> 9 +6 -a = 0

=> 15-a = 0

=> 15 = 0+a

=> 15 = a

=> a = 15

Therefore, a = 15

Answer:-

The value of a for the given problem is 15