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gabrielrosario
@gabrielrosario
July 2022
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Resolva as equações de 2°grau abaixo :
a) 4x² - 36 = 0
b) 3x² = 27
c) x² - 4 = 12
d) 4x² - 25 = 0
e) x² + 1 = 0
f) -2x² + 7 = 0
g) 3x² = 0
h) 4 = x²
i) x² = 0
j) x² + 1 = 1
Agradeço, desde já!
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AioGou
A) 4x² = 36 ⇒ x² = 36/4
x² = 9 ⇒ x = √9
x = 3
b) x² = 27/3 ⇒ x² = 9
x = √9
x = 3
c) x² = 12+4 ⇒ x² = 16
x = √16
x = 4
d) 4x² = 25 ⇒ x² = 25/4
x = √5²/4
x = 5/2
e) x² = 1 ⇒ x = √1
x = 1
f)
g) x² = 3 ⇒ √3
h) x = √4
x = 2
i) x = √0
x = 0
j) x² = 1 - 1 ⇒ x² = 0
x = √0
x = 0
2 votes
Thanks 1
gabrielrosario
Obrigado !
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x² = 9 ⇒ x = √9
x = 3
b) x² = 27/3 ⇒ x² = 9
x = √9
x = 3
c) x² = 12+4 ⇒ x² = 16
x = √16
x = 4
d) 4x² = 25 ⇒ x² = 25/4
x = √5²/4
x = 5/2
e) x² = 1 ⇒ x = √1
x = 1
f)
g) x² = 3 ⇒ √3
h) x = √4
x = 2
i) x = √0
x = 0
j) x² = 1 - 1 ⇒ x² = 0
x = √0
x = 0