Cara jawab28,29 beserta langkah

nomer 28

²log (x - 2) + ²log (x + 5) ≤ 3
²log ( (x - 2) × (x + 5) ) ≤ ²log 2³
(x - 2) (x + 5) ≤ 2³
x² + 3x - 10 ≤ 8
x² + 3x - 18 ≤ 0
(x + 6) (x - 3) ≤ 0
x = -6 atau x = 3
-6 ≤ x ≤ 3. .......(i)

syarta numerus
x - 2 > 0
x > 2 ......(ii)
x + 5 > 0
x > - 5 .......(iii)

irisan (i) (ii) (iii)
HP [ x | 2 < x ≤ 3 ]
D

29)
⅓ 'log (2x - 6) ≤ ⅓ 'log (x + 2)
(2x - 6) ≥ (x + 2)
2x - x ≥ 2 + 6
x ≥ 8 ........(i)

syarat numerus
(2x - 6) > 0
x > 3 .......(ii)
x + 2 > 0
x > - 2 .......(iii)

irisan (i) (ii) (iii)
HP [ x | x ≥ 8]
C