3. Resolva as equações do 2º GRAU a) x²–5x+6=0C) x² + 2x - 8=0d) x² - 5x+8=0e) x² - 4x-5=0f)
3. Resolva as equações do 2º GRAU a) x²–5x+6=0
C) x² + 2x - 8=0
d) x² - 5x+8=0
e) x² - 4x-5=0
f) x² + x + 12 = 0
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