Jawablah pertanyaan berikut dengan benar! Dijawab pake cara! (1). |× – 120| = |2 × + 5| (2). 2 | × + 5| – | 2 × + 4| = 0​​​​

Jawablah pertanyaan berikut dengan benar!Dijawab pake cara!

(1). |× – 120| = |2 × + 5|
(2). 2 | × + 5| – | 2 × + 4| = 0​​​​

NIlai MUtlak
1) |x – 120| = |2x+ 5|
x- 120 = 2x + 5   atau  120 – x = 2x + 5
-x = 125   atau  – 3x = 115
x = – 125   atau x = -115/3

 

2)  2|x + 5| – |2x+4| = 0
2|x + 5| = |2x +4|
|2x+ 10| = |2x + 4|
(2x+ 10 +2x+ 4)(2x+ 10-2x- 4) =0
(4x + 14)(6) =0
4x + 14= 0
x = – 14/4
x = – 7/2

 

 

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