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^2-1,\ x=1,\ -1

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)=3x+1,\ x=\ -1/3

Verify whether the indicated numbers are zeros of the polynomials corresponding to them in that cases: g(x)=\ 3x^2-2,\ x=2/(sqrt(3)),\ -2/(sqrt(3))

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)=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: 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)=l x+m ,\ x=\ -m/l

Verify whether the indicated numbers are zeros of the polynomials corresponding to them in that cases: g(x)=3x^(2)-2,x=(2)/(sqrt(3)),-(2)/(sqrt(3))