Respostas

2013-10-17T16:55:07-03:00
A) (-5)².x²=(-5).(-5).x²=25x²
b)2³.(x²)³.y³.(z²)³=8x^6.y^3.z^6
c)(-3)².(s²)²=(-3).(-3).s^4=9s^4
2 5 2