Bien, solo es buscar las raices de los numeros que pides multiplicados asi mismo.
<img src="https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7B-125%7D%3D-5" /> Ya que<img src="https://tex.z-dn.net/?f=-5%5Cleft%28-5%5Cright%29%5Cleft%28-5%5Cright%29%3D-5%5Ccdot%20%5C%3A5%5Ccdot%20%5C%3A5%3D-125" />
<img src="https://tex.z-dn.net/?f=%5Csqrt%5B7%5D%7B-128%7D%3D-2" /> Ya que<img src="https://tex.z-dn.net/?f=-2%5Cleft%28-2%5Cright%29%5Cleft%28-2%5Cright%29%5Cleft%28-2%5Cright%29%5Cleft%28-2%5Cright%29%5Cleft%28-2%5Cright%29%5Cleft%28-2%5Cright%29%3D-2%5Ccdot%20%5C%3A2%5Ccdot%20%5C%3A2%5Ccdot%20%5C%3A2%5Ccdot%20%5C%3A2%5Ccdot%20%5C%3A2%5Ccdot%20%5C%3A2%3D-128" />
<img src="https://tex.z-dn.net/?f=%5Csqrt%5B5%5D%7B243%7D%3D3" /> Ya que<img src="https://tex.z-dn.net/?f=3%5Ccdot%20%5C%3A3%5Ccdot%20%5C%3A3%5Ccdot%20%5C%3A3%5Ccdot%20%5C%3A3%3D243" />
<img src="https://tex.z-dn.net/?f=%5Csqrt%5B4%5D%7B625%7D%3D5" /> Ya que<img src="https://tex.z-dn.net/?f=5%5Ccdot%20%5C%3A5%5Ccdot%20%5C%3A5%5Ccdot%20%5C%3A5%3D625" />.