Decide whether the given x-value is a zero of the function.  1. f(x)=x^3 + 5x^2 +x +5 : x= -5 2. f(x)= x^3 -3x^2 +x -3 : x= -i 3. Given the zeros x= -1 and x= 1. Find the remaining zeros of f(x)=x^4 –

Decide whether the given x-value is a zero of the function. 1. f(x)=x^3 + 5x^2 +x +5 : x= -52. f(x)= x^3 -3x^2 +x -3 : x= -i3. Given the zeros x= -1 and x= 1. Find the remaining zeros of f(x)=x^4 -4x^3 +4x -1