Respostas

  • Usuário do Brainly
2014-05-20T20:54:30-03:00
X² = 9
x = ± √9
x = ± 3

4x² - 36 = 0
4x² = 36
x² = 36/4
x² = 9
x = ± √9
x = ± 3

3x² = 27
x² = 27/3
x² = 9
x = ± √9
x = ± 3

x² - 4 = 12
x² = 12 + 4
x² = 16
x = 
± √16
x = ± 4
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2014-05-20T20:57:44-03:00
x²=9____________x= \sqrt{9} =3
4x² - 36 = 0 _______4 x^{2} =36_____ x^{2} =36/4= x^{2} = \sqrt{9} =x=3
3x² = 27____ x^{2} =27/3= x^{2} =9=x= \sqrt{} 9=x=3
x²-4 = 12
___ x^{2} =12/4= x^{2} =3=x= \sqrt{3}
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