Martin and Lianzi were each asked to factor the polynomial expression $4k^4+32k^3+60k^2$. Their responses are shown below. **Martin** ||| **Lianzi** :-:|:-:|:-:|:-: $-4k^2(k-3)(k-5)$ ||| $4k^2(k+3)(k+5)$ **Which student wrote an expression that is equivalent to $4k^4+32k^3+60k^2$ ?** [[☃ radio 1]]