Escribe el polinomio q hace falta en cada operacionA)( - 8m3 + 4m2 - 3) + ?

Escribe el polinomio que hace falta en cada operación

A)( - 8m3 + 4m2 - 3) + .

= - 6m3 - 8m + 5

<img src="https://tex.z-dn.net/?f=%5Cleft%28-8m%5E3%2B4m%5E2-3%5Cright%29%2Bx%3D-6m%5E3-8m%2B5%0A%0A%5Cmathrm%7BRestar%5C%3A%7D-8m%5E3%2B4m%5E2%5Cmathrm%7B%5C%3Ade%5C%3Aambos%5C%3Alados%7D%0A" />

<img src="https://tex.z-dn.net/?f=-3%2Bx%3D2m%5E3-4m%5E2-8m%2B5%0A%0A-3%2Bx%2B3%3D2m%5E3-4m%5E2-8m%2B5%2B3%0A%0Ax%3D2m%5E3-4m%5E2-8m%2B8" />

B)(3x2y - 4xy2 - 7x) - .

= - 9x2y + 5xy2 - 8x

<img src="https://tex.z-dn.net/?f=%5Cleft%283x%5E2y-4xy%5E2-7x%5Cright%29-a%3D-9x%5E2y%2B5xy%5E2-%5C%3A8x" />

<img src="https://tex.z-dn.net/?f=%5Cleft%283x%5E2y-4xy%5E2-7x%5Cright%29-a%3D%5Cleft%28-9x%5E2y%2B5xy%5E2-%5C%3A8x%5Cright%29" />

<img src="https://tex.z-dn.net/?f=%5Cleft%283x%5E2y-4xy%5E2-7x%5Cright%29-%5Cleft%28-9x%5E2y%2B5xy%5E2-%5C%3A8x%5Cright%29%3Da" />

<img src="https://tex.z-dn.net/?f=3x%5E2y-4xy%5E2-7x%2B9x%5E2y-5xy%5E2%2B8x" />

<img src="https://tex.z-dn.net/?f=12x%5E2y-9xy%5E2%2Bx" />.