Respostas

2014-03-19T17:04:47-03:00
5x²16 
a)(-4)
 5.(-4)
².16
5.16.16=1280
  
     b)(3)  
5.(3)
².16=5.9.16=720 

    c)V¨2¨ 
5.(
√2)².16=5.2.16=160