Question

If '3' is a zero of the polynomial 2 x   2x a then find 'a'.

Answer 1

Step-by-step explanation:

ANSWER

Let p(x)=x2+2x−a

As the zero of this polynomial is 3, we know that p(3)=0.

x2+2x−a=0

Put x=3, we get

(3)2+2(3)−a=0

⇒9+6−a=0

⇒15−a=0

⇒−a=−15

⇒a=15