Respostas

2014-06-09T19:57:47-03:00
X² - 225 = 0 => x² = 225 => x² = 15² => x = 15
2 5 2
2014-06-09T19:58:25-03:00
X²-225=0
x
²=225
x=√225
x=15
2 5 2