Question

If ‘3’ is a zero of the polynomial x^2 + 2x− a, find ‘a’.

please solve it​

Answer 1

Answer:

15

Step-by-step explanation:

Put the value of x that is given as a zero =3

=> 3^2+2*3-a=0

=> 9+6-a=0

=> 15-a=0

=> - a= - 15

=> a= 15

Answer 2

Answer:

by putting the value of x=3 in equation x²+2x-a, we get:-

p(x)=x²+2x-a=0

p(3)= (3)²+2×3-a=0

=> 9+6-a=0

=> -a= -15

therefore, a=15(ANS)