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OPGAVEN |
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1. |
Los op: 6/(x - 1) +
2x = 10 |
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2. |
Los op: (2x - 4)/(x
- 2) = 2 |
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3. |
y = (2x - 1)/(x + 2)
maak x vrij. |
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OPLOSSING |
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1. |
6/(x
- 1) + 2x = 10
6 + 2x(x - 1) = 10(x - 1)
6 + 2x2 - 2x = 10x - 10
2x2 - 12x + 16 = 0
2(x2 - 6x + 8) = 0
2(x - 4)(x - 2) = 0
x = 4 ∨ x = 2 |
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2. |
(3x - 4)/(x
- 1) = 2
3x - 4 = 2(x - 1)
3x - 4 = 2x - 2
x = 2 |
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3. |
y = (2x
- 1)/(x + 2)
(x + 2)y = 2x - 1
xy + 2y = 2x - 1
xy - 2x = -2y - 1
x(y - 2) = -2y - 1
x = (-2y - 1)/(y
- 2) |
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