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peterkiss1
@peterkiss1
October 2020
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quem puder desenvolver os produtos notáveis eu agradeço:
(x+9).(x-9)
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Joww
(x+9).(x-9) = x² - 9² = x² - 81
x² - 81
⇔ x² = 81 ⇔ x =√81 ⇔ x = 9
1 votes
Thanks 1
poty
Verified answer
A resposta é: x²+9x-9x-81
ou seja: x²-81.
1 votes
Thanks 1
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x² - 81 ⇔ x² = 81 ⇔ x =√81 ⇔ x = 9
Verified answer
A resposta é: x²+9x-9x-81ou seja: x²-81.