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18 November, 23:42

X² - 6x + 9=16 A solução?

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  1. 19 November, 01:09
    0
    Torná-lo igual a 0

    x ²-6x+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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