Question

Tolong bntu dong.no9,10,sma 11
trimksh.:-)

Answer 1

9. | 2x + 1 | > 5
| 2x + 1 | < -5 | 2x + 1| > 5
2x + 1 < -5 2x + 1 > 5
2x < -5 -1 2x > 5-1
2x < -6 2x > 4
x < -6/2 x > 4/2
x < -3 x > 2
jd C. x < -3 atau x > 2
10. |4x + 7| = |x-2|
4x + 7 = x-2 .... (1)
4x - x = -2-7
3x = -9
x = -9/3
x = -3

4x + 7 = -(x - 2) ....(2)
4x +7 = -x +2
4x + x = 2-7
5x = -5
x = -5/5
x = -1
jd A. {-3,-1}
11. C