The answer is <span>y = x2 − 4 if you try to factor out all of the equations given to you (ex. 0=x2+4x+2), the only equation that can be factored out is </span><span>y = x2 − 4. </span><span> y = x2 − 4 </span><span>0= x2 − 4 </span>0=(x-2)(x+2) 0=x-2 0=x+2 2=x x=-2