I 7-4X I ≤ 9 CARA KERJA DAN HPNYA ()

Question

Matematika Diposting : 2017-10-04 Diupdate : 2021-08-18 Royalpopcorn

Pertanyaan

I 7-4X I ≤ 9
CARA KERJA DAN HPNYA ()

Answer 1

| 7-4x|≤9
<=> -9 ≤ 7-4x ≤9
<=> -9-7≤ -4x ≤9-7
<=> -16≤ -4x ≤2
<=> -16/-4 ≤x≤2/-4
<=> 4≤ x ≤ -½
<=> -½ ≤ x ≤ 4
hp {x|-½≤x≤4}

Answer 2

| 7- 4x| ≤ 9
-9 ≤ 7- 4x ≤9
-9 - 7 ≤ - 4x ≤ 9 - 7
-16 ≤ - 4x ≤ 2
-16/-4 ≥ x ≥ 2/-4
4 ≥ x ≥ -1/2
Hp { -1/2 ≤ x ≤ 4 }

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