[tex]d) \{ -1 ; +1\}\\e) \pm\sqrt[2]{5}\\ f) \pm5\\g) \pm2\\h) s = \{ \}\\[/tex]
Equações do segundo grau incompletas
[tex]d) 8x^2 - 8 = 0\\\\8x^2 = 8\\\\x^2 = 8 / 8\\\\x^2 = 1\\\\x= \pm\sqrt[2]{1}\\\\x = \pm1\\\\ S = \{(-1 ; +1)\}[/tex]
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[tex]e) 4x^2 - 20 = 0\\\\4x^2 = 20\\\\x^2 = 20 / 4\\\\x^2 = 5\\\\x = \pm\sqrt[2]{5}\\\\[/tex]
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[tex]f) -25 + x^2 = 0\\\\x^2 = 25\\\\x = \pm\sqrt[2]{25}\\\\ x = \pm5[/tex]
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[tex]g) 7x^2 + 2 = 30\\\\7x^2 = 30 - 2\\\\7x^2 = 28\\\\x^2 = 28 / 7\\\\x^2 = 4\\\\x = \pm\sqrt[2]{4}\\\\x = \pm2\\[/tex]
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[tex]h) x^2 + 16 = 0\\\\x^2 = -16\\\\x = \pm\sqrt[2]{-16}\\\\ S = \{ \}\\\\[/tex]
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