Respostas

  • Usuário do Brainly
2014-05-20T21:17:57-03:00
4x² - 25 = 0
4x² = 25
x² = 25/4
x = ± √25/4
x = ± √5²/2²
x = ± √(5/2)²
x = ± 5/2

5x²/2 = 2/5
25x² = 4
x² = 4/25
x = ± √4/25
x = ± √2²/5²
x = ± √(2/5)²
x = ± 2/5

x² + 1 = 0
x² = - 1
x = ± √- 1

4 = x²
x² = 4
x = ± √4
x = ± 2

- 2x² + 7 = 0
- 2x² = - 7 . (- 1)
2x² = 7
x² = 7/2
x = ± √7/2

x² = 0
x = ± √0
x = ± 0
x = 0

3x² = 0
x² = 0/3
x² = 0
x = ± √0
x = ± 0
x = 0

x² + 1 = 1
x² = 1 - 1
x² = 0
x = ± √0
x = ± 0
x = 0
1 5 1