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Ray2390
@Ray2390
January 2020
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Dada a expressão: *anexo*
Sendo a=1,b=-7,e c=10,O valor numérico de x é:
A.-5
B.-2
C.2
E.5
Me ajudem meu trabalho está muito complicado estou com muitas dúvidas!
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usuário1229
Verified answer
X=
x=
x=5
3 votes
Thanks 3
DanielS6
X = (-b + √b² - 4ac)/2a
x = (-(- 7) + √(- 7)² - 4 . 1 . 10)/2 . 1
x = (7 + √49 - 40)/2
x = (7 + √9)/2
x = (7 + 3)/2
x = 10/2
x = 5
3 votes
Thanks 5
DanielS6
49 - 40 = 9
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Verified answer
X=x=
x=5
x = (-(- 7) + √(- 7)² - 4 . 1 . 10)/2 . 1
x = (7 + √49 - 40)/2
x = (7 + √9)/2
x = (7 + 3)/2
x = 10/2
x = 5