Verify whether the indicated numbers are zeros of the polynomials corresponding to them in that cases: `f(x)=l x+m ,\ x=\ -m/l`

Verify whether the indicated numbers are zeros of the polynomials corresponding to them in that cases: f(x)=x^2,\ x=0

Verify whether the indicated numbers are zeros of the polynomials corresponding to them in that cases: f(x)=x^(2),x=0

Verify whether the indicated numbers are zeros of the polynomials corresponding to them in that cases: f(x)=2x+1,\ x=1/2

Verify whether the indicated numbers are zeros of the polynomials corresponding to them in that cases: f(x)=lx+m,x=-(m)/(l)

Verify whether the indicated numbers are zeros of the polynomials corresponding to them in that cases: f(x)=x^2-1,\ x=1,\ -1

Verify whether the indicated numbers are zeros of the polynomials corresponding to them in that cases: f(x)=3x+1,\ x=\ -1/3

Verify whether the indicated numbers are zeros of the polynomials corresponding to them in that cases: f(x)=3x+1,x=-(1)/(3)

Verify whether the indicated numbers are zeros of the polynomials corresponding to them in that cases: f(x)=2x+1,x=(1)/(2)

Verify whether the indicated numbers are zeros of the polynomials corresponding to them in that cases: f(x)=x^(2)-1,x=1,quad -1

Verify whether the indicated numbers are zeros of the polynomials corresponding to them in that cases: p(x)=x^3-6x^2+11 x-6,\ x=1,\ 2,\ 3