Question

qual a forma reduzida de cada  um dos polinomios

7a²-(5a²-9a+2)+(-2a+a²-1)

Answer 1

7a²-(5a²-9a+2)+(-2a+a²-1)
7a²-5a²+9a-2-2a+a²-1
7a²-5a²+a²+9a-2a-1-2
3a²+7a-3

Answer 2

7a²-(5a²-9a+2)+(-2a+a²-1)
 7a²-5a²+9a-2-2a+a²-1
 7a²-5a²+a²+9a-2a-2-1
   3a² + 7a - 3