Guther
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2 . a
Exemplo:
3x² - 4x + 1 = 0
a = 3 b = - 4 c = 1
Δ = b² - 4 . a . c
Δ = (- 4)² - 4 . 3 . 1
Δ = 16 - 12
Δ = 4
x = - b ± √Δ
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2 . a
x = - (- 4) ± √4
------------------
2 . 3
x = 4 ± 2
---------
6
x' = 4 + 2
6
x' = 6 ÷ 6
x' = 1
x" = 4 - 2
6
x" = 2 ÷ 6
x" = 1/3
Resposta: {1; 1/3}
Verified answer
X = - b ± √Δ-----------------
2 . a
Exemplo:
3x² - 4x + 1 = 0
a = 3 b = - 4 c = 1
Δ = b² - 4 . a . c
Δ = (- 4)² - 4 . 3 . 1
Δ = 16 - 12
Δ = 4
x = - b ± √Δ
-------------
2 . a
x = - (- 4) ± √4
------------------
2 . 3
x = 4 ± 2
---------
6
x' = 4 + 2
6
x' = 6 ÷ 6
x' = 1
x" = 4 - 2
6
x" = 2 ÷ 6
x" = 1/3
Resposta: {1; 1/3}
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