Question

check whether 1 and -1 are the zeros of the polynomial X square + X - 2​

Answer 1

Answer:

(x-1)is the zero of x^2+x-2

Step-by-step explanation:

f(x)=x^2+x-2

Now,

f(1)=(1)^2+(1)-2

   =1+1-2

   =0

therefore, (x-1)is the zero of x^2+x-2

f(x)=x^2+x-2

Now,

f(-1)=(-1)^2+(-1)-2

   =1-1-2

   =-2

therefore, (x+1)is the zero of x^2+x-2

Answer 2

Answer:

1 is the zero but -1 is not a zero.