Respostas

2014-06-08T14:27:36-03:00
4x²=25
x=20
porque 
x²=25
x=5
5*4=20
1 3 1
2014-06-08T14:31:27-03:00
4x² - 25 = 0 
4x² = 25 
x² = 25/4 
x² = 6,25
x = Raiz quadrada de 6,25 = 2,5 
1 3 1