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16-03-2017
Mathematics

contestada

x²- 6x + 9=16 A solução?

Respuesta :

apologiabiology apologiabiology

16-03-2017

Torná-lo igual a 0

x²-6x+9=16
x²-6x-7=0
fator
Encontrar o que 2 números se multiplicam para obter -7 e adicionar para obter -6
-7 e 1
(x-7)(x+1)=0
Definir cada um igual a 0 e resolver para x

x-7=0
x=7

x+1=0
x=-1

x=-1 e 7

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