Respostas

2014-08-12T11:34:18-03:00
3x²=75
x²=75/3
x²=25
x=√25
x=5
2014-08-12T11:37:31-03:00
X²= 75/3
x²=25
x=+/- √25
x= 5
espero ajudar :)