Resolva as equações do 2 grau (I).... Pergunta de ideia detakedrauhl

takedrauhl @takedrauhl

October 2020 1 62 Report

Resolva as equações do 2 grau (I)

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savanna

Verified answer

Olá Takedrauhl.

x(-3x+7)-2=0
- Aplique a distributiva.
-3x²+7x-2=0
- Multiplique toda a equação por -1 para que o x² seja positivo.
3x²-7x+2=0

Resolva por Bhaskara:
a = 3 b= -7 c = 2
Δ= b²-4ac
Δ= (-7)² - 4·3·2
Δ= 49 - 24
Δ=25

Encontrando as raízes:

x= -b +/- √Δ
2a

Substituindo os valores:
x= - (-7) +/- √25
2·3
x= 7 +/- 5
6
x' = 2
x''= 1/3

S:[ 1/3,2]

0 votes Thanks 1

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