Tentukan hp dan persamaan 1. |x-7|+|2x-4|=5 2. |2x+4|-|3-x|=-1
Matematika
Angelicarianna27
Pertanyaan
Tentukan hp dan persamaan
1. |x-7|+|2x-4|=5
2. |2x+4|-|3-x|=-1
1. |x-7|+|2x-4|=5
2. |2x+4|-|3-x|=-1
1 Jawaban
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1. Jawaban Darksimple
1 |x - 7| + |2x - 4| = 5
x - 7 + 2x - 4 = 5
x + 2x - 7 - 4 = 5
3x - 11 = 5
3x = 5 + 11
3x = 16
x = 16/3
x - 7 + 2x - 4 = -5
x + 2x - 7 - 4 = -5
3x - 11 = -5
3x = -5 + 11
3x = 6
x = 2
HP = {2, 16/3}
2 |2x + 4| - |3 - x| = -1
2x + 4 - 3 - x = -1
2x - x + 4 - 3 = -1
x + 1 = -1
x = -1 - 1
x = 2
2x + 4 - 3 - x = 1
2x - x + 4 - 3 = 1
x + 1 = 1
x = 1 - 1
x = 0
HP = {0, 2}