Tentukan himpunan dari : 1. 2x -8 = 8x - 12 2. 5x - 4 < 2x - 8 3. 8x -2 (2x -1) >/ 5x 4. X^2 - 6x - 16 = 0 5. X^2 + 2x - 15 = 0 6. X^2 + 8x - 9 = 0 7. X^2 + 8x

1) 2x - 8 = 8x - 12
2x - 8x = - 12 + 8
- 6x = - 4
x = - 4/6
x = - ⅔
hp = { - ⅔}

2) 5x - 4 < 2x - 8
5x - 2x < 4 - 8
3x < - 4
x < - 4/3
hp = { x < - 4/3 }

3) 8x - 2 (2x - 1) >/ 5x
8x - 4x + 2 >/ 5x
4x + 2 >/ 5x
4x - 5x >/ - 2
- x \< - 2
x \< 2
hp = { x \< 2}

4) x² - 6x - 16 = 0
( x - 8) ( x + 2) = 0
x = 8 atau x = - 2
hp = { -2 , 8 }

5) x² + 2x - 15 = 0
( x + 5) ( x - 3) = 0
x = - 5 atau x = 3
hp = { - 5 , 3 }

6) x² + 8x - 9 = 0
( x + 9 ) ( x - 1) = 0
x = - 9 atau x = 1
hp = { -9 , 1}

7) x² + 8x + 7 = 0
( x + 7)(x + 1) = 0
x = - 7 atau x = - 1
hp = { - 1, - 7 }