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Maycongarcia
@Maycongarcia
April 2020
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Equação do 2 Grau
a) x elevado a 2 - 8 x - 9= 0
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raaafapacheco
X² - 8x - 9 =0
Δ= 64 - 4.1.- 9
= 64+36 = 100
x1 = 8+10/2 = 18/2 = 9
x2 = 8-10/2 = -2/2 = -1
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Δ= 64 - 4.1.- 9
= 64+36 = 100
x1 = 8+10/2 = 18/2 = 9
x2 = 8-10/2 = -2/2 = -1