Respostas

2014-08-04T15:57:18-03:00
8x² = 60 - 7x²
8x² + 7x² = 60
15x² = 60
x² = 60 ÷ 15
x² = 4
x = √4
x = 2
1 5 1
2014-08-04T15:57:47-03:00
8x² = 60 - 7x²
8x² + 7x² = 60
15x² = 60
x² = 60 ÷ 15
x² = 4
x = √4
x = 2