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Kaiane0506
@Kaiane0506
December 2019
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Equação 2 grau:
(x-4)² + 15-x/3=27
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mgs45
(x-4)² + 15 - x/3 = 27
x² - 8x + 16 + 15 - x = 27
---
3
3x² - 24x + 48 + 45 - x = 81
3x² - 25x + 93 - 81 = 0
3x² - 25x + 12 = 0
Δ = 625 - 4. 3. 12
Δ = 625 - 144
Δ = 481
- (-25) + √481 25 + 21,9 46,9
x' = ------------------- ∴ x' = -------------- ∴ x' = ------ ∴ x' = 7,81 ∴ x' ≈ 8
2.3 6 6
25 - 21,9 3,1
x'' = ------------ ∴ x'' = ----- ∴ x'' ≈ 0.51
6 6
S = {8; 0,51}
1 votes
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Lista de comentários
x² - 8x + 16 + 15 - x = 27
---
3
3x² - 24x + 48 + 45 - x = 81
3x² - 25x + 93 - 81 = 0
3x² - 25x + 12 = 0
Δ = 625 - 4. 3. 12
Δ = 625 - 144
Δ = 481
- (-25) + √481 25 + 21,9 46,9
x' = ------------------- ∴ x' = -------------- ∴ x' = ------ ∴ x' = 7,81 ∴ x' ≈ 8
2.3 6 6
25 - 21,9 3,1
x'' = ------------ ∴ x'' = ----- ∴ x'' ≈ 0.51
6 6
S = {8; 0,51}