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Welynton222
@Welynton222
November 2019
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O conjunto solução da equação 3x² + 9x - 19 = 4x² + 17x - 7 é
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kalifa
3x² + 9x - 19 = 4x² + 17x - 7
3x² + 9x - 19 - 4x² - 17x + 7 = 0
-x² - 8x -12 = 0 (-1)
x² + 8x +12 = 0
x1 + x2 = -b/a
x1 . x2 = c/a
Valores geram o resultado
x1 + x2 = -(8)
x1 . x2 = (12)
x1 + x2 = -8
x1 . x2 = 12
x1 = -6
x2 = -2
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Thanks 0
fusileropreto
3x^2 + 9x - 19 = 4x^2 + 17x - 7
3x^2 + 9x - 19 - 4x^2 - 17x + 7 = 0
3x^2 - 4x^2 + 9x - 17x - 19 + 7 = 0
- x^2 - 8x -12 = 0
a = -1 b = -8 c = -12
formula delta
D = b^2 - 4 a c
D = (-8)^2 - 4 (-1)(-12)
D = 64 + 4 (-12)
D = 64 - 48
D = 16
formula da braakara
x = - b + , - \/D
......_________
...............2a
x = - (-8) + , - \/16
.......__________
................2(-1)
x = 8 + , - 4
......______
..........-2
x' = 8 + 4
.......____
.........-2
x' = 12
.......____
.........-2
x' = - 6
x" = 8 - 4
........____
..........-2
x" = 4
........___
.........-2
x" = - 2
S = { - 2 ; - 6 }
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Thanks 0
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Lista de comentários
3x² + 9x - 19 - 4x² - 17x + 7 = 0
-x² - 8x -12 = 0 (-1)
x² + 8x +12 = 0
x1 + x2 = -b/a
x1 . x2 = c/a
Valores geram o resultado
x1 + x2 = -(8)
x1 . x2 = (12)
x1 + x2 = -8
x1 . x2 = 12
x1 = -6
x2 = -2
3x^2 + 9x - 19 - 4x^2 - 17x + 7 = 0
3x^2 - 4x^2 + 9x - 17x - 19 + 7 = 0
- x^2 - 8x -12 = 0
a = -1 b = -8 c = -12
formula delta
D = b^2 - 4 a c
D = (-8)^2 - 4 (-1)(-12)
D = 64 + 4 (-12)
D = 64 - 48
D = 16
formula da braakara
x = - b + , - \/D
......_________
...............2a
x = - (-8) + , - \/16
.......__________
................2(-1)
x = 8 + , - 4
......______
..........-2
x' = 8 + 4
.......____
.........-2
x' = 12
.......____
.........-2
x' = - 6
x" = 8 - 4
........____
..........-2
x" = 4
........___
.........-2
x" = - 2
S = { - 2 ; - 6 }